At the age of 19, you sure have to face a lot of medical problems.
But so so many others I know and have known!

Some people get more than their share of woes and illnesses, because of malefic planets acting in their horoscopes in this particular period of life, which usually lasts from a few months to some years.

But you would surely be treated for all these complaints and get better! Why wouldn't you?
Then you can continue your college education, maybe after a short break if necessary.

Don't give up Hope, keep the Faith in yourself and you will surely overcome your difficulties!

In reference to what firetopaz's comment, i suggest you to go meet with a spiritual doctor.  all that i know is this, it seems your body tends to go acidic, In order to get your PH Back in balance, it takes calcium from your body, therefore causing other symptoms. "IT SEEMS," this is most likely occurs from a chain reaction at a finer vibration, or in spirit, of energy absorbtion, of whether it be pain, suffering, or whatever it might be ,  your absorbing from the people in your reality.  This can cause digestive problems as well.  A spiritual doctor, being, reiki master, acupuncturist, chinese traditional medicine practicioner, those would be right up your alley health wise.  something you could do to help relax the tension in your body, and allow thoughts to just flow through the awareness, without judgement, just allowence, just being, isness,  is meditate.
In reference to solving the acidity,  Are you on a nutritional diet?  If your diet does not contain the proper minerals to support the absorbtion of calcium, then its reallly only a madder of time.

Whatever is meant to happen will happen, honey, regardless of what you do. That's not to say that you don't have a choice: you do. I believe everyone makes up their own destiny -- it doesn't mean the destiny isn't already known by God/the universe.

Like you, I've been constantly pounded with sicknesses -- one after the other. And I've had some similar ones to you too. For the past ten years, I've had acid reflux and when I quit taking my meds for it (thought I didn't need them, because I felt better), I started getting an ulcer. My first semester of college (which was fall of 2007 because I took a year off before I went), I was very healthy, happy, and I thrived at school. I made wonderful grades and had friends and everything felt like "the best years".

Then, the next semester, I started getting barraged with sickness. First, it was pancreatitis that January. I had never had that before, at the time, and I was very scared due to issues stemming from almost dying as a child. They put me in the hospital and I missed out on a whole week of classes (which is bad when you can only miss 12 days a semester!). I remember sitting in that hospital bed and watching the news. Heath Ledger had just died and that sparked something in me: even though pancreatitis can be fatal, I told myself: "you're not going to die". And even though I felt like I would, they let me out the next day -- my enzymes had returned to normal.

Then, a month later, I came down with the mumps. The MUMPS! I was very shocked and confused, because I had been vaccinated completely for the illness as a child. Mumps is almost completely eradicated in my country. It's very rare. At first they thought I had cancer and told me they wanted to biopsy my glands, so after hearing that, mumps was the better alternative. With that, I had to miss more than a week of school, because nobody wanted me around until there was no way I could be contagious (I go to a university where there's a lot of foreign students who haven't necessarily had the vaccinations, so they didn't want me starting a campus epidemic).

The illnesses bothered me, because I was still enjoying classes and I was happy otherwise, aside of the sickness. But other minor incidences in between and afterward made it VERY hard to keep up with my studies. It came to the point where I was unable to miss anymore classes or else they would automatically give me no credit (after all that hard work, I had managed to keep my grades up very high, so that would be BAD).

But then it happened. I met my soul mate at the end of that second semester (not AT school, per se, though he was a student there too at the time). Being with him made me so happy, I sailed through my exams effortlessly (without studying) and was ecstatic to get my research paper back with the grade of 96 (which I wasn't expecting). Everything was going good.

Then, my ex broke up with me (neither of us is still sure why) at the end of the summer. When it was time to go back to school, I was constantly sick again -- more often than before. Every week it was something new to the point where I lost all enjoyment in school. I was so far behind, I had to drop out with the hope that by doing so, I'd be allowed back again. Well, now it's this semester and I've been so sick, I haven't been able to keep up with my two classes -- just two classes.

Week before last, it was pancreatitis again. Then I was told I might have Crohn's disease (also had a terrible stomach virus at the same time), but instead it turned out to be polycystic ovarian disease (which isn't as painful, but just as incurable and makes life more difficult all the same).

Whew. So, you're probably wondering what I'm getting at. And that is: I've felt quite similar to the way you do now.

But I've always heard that God/universe doesn't put you through more than you can handle and I believe it. Everything happens for a reason. No matter what you do, you'll always end up doing the right thing for you at the right time as long as long as you follow your heart. Listen to your heart. Pray or meditate. Look within and ask for guidance.

I don't know why both of us have been so sick, or why college has been so difficult, or why the hope of just that one guy is our only solace. But there's reasons for it and by suggesting you look within, I've given you the best advice that has ever been given to me. I hope that helps and stay strong!

Many hugs, love, and good vibes,
PrettySiren

P.S. As for being sick so much, just tell yourself that you'll be okay and never believe otherwise. When bad things happen, it's just stuff. But by knowing you'll be okay no matter how bad it gets, you've already got the upper hand.

I feel so much sympathy for you. Please don't get angry, but perhaps the best option that you're waiting for has been shown by your troubles.  From my own experience, I learned that many times, I was lead to the right direction through the troubles that confronted me. I watched the movie United 93--about the September 11--and there's a story in that movie about a young man who was almost late to got in the plane. He ran as fast as he can and even cried to the stewardess to hold the door. He was luckily suceeded....but a luck that later came as tragedy. If only he had late and missed the plane.....
    Me too had gone through many--what I think at the beginnings as--misfortunes. I hardly found any lover for my preferences that I think is unique but many think as odd or strange. I thought that I must have been born in the wrong country. In my 20's, an evil shaman had cursed me(called in my country as "santet"--something like Voodoo, that is when a shaman(or in Indonesian: Dukun) put things into your bodies, like nails, frying pan, etc). In my case, I felt very itch in my solar plexus. Perhaps it sounds funny or trivial, but it made me suffered a lot. I had tried to commit suicide 3 or 4 times--and thanks to Dana & Lady Liberty, it all failed. My parents who do not believe in such things thought that I would gone mad, had tried to sent me to mental institution, but once again, Dana & Lady Liberty saved me.
    I couldn't see any future back then, but now after those darkness passed, I can see everything very clearly. I do not regret about my birthplace anymore or about the curse. I wouldn't be like I am now, with the spiritual level that I have reached, if not because all those misfortunes.
I hope these could give some considerations for you...