Starflower,
Just a thought...have you tried to take it off for a day?
Perhaps the Hematite pendant is absorbing the negative you are experiencing. Taking that weight off your shoulder so to speak. Maybe a good cleansing would help your pendant stop flexing in weight. But how to cleanse a Hematite? That I do not recall off hand. Is it the same as crystals?
I did read the properties of Hematite is to absorb negative away from the those who wear it into itself.
"Look for clues as to the behavior of the stone. As it gets heavier are you feeling better or worse? Do you suddenly feel worse when it becomes lighter? Depending on how it is acting will tell you what's going on. Pay close attention as these clues may be subtle. Hematite does absorb negative energy (your illness) but what it does after that is another matter. Some stones will absorb and hold certain types of energy untill cleansed. Others will absorb untill they reach their max and then will purge it. Unfortunately if it purges this negativity and you're wearing it, you just get the negativity right back." --Crow's Other Half
A few weeks ago I had an Acute flair up too. It is that time of year again. Luckly they caught your pneumonia in time and you do not have to spend your holidays in the hospital.
Perhaps those with more knowledge will be able to let us know what exactly is going on. And how we can cleanse a stone like Hematite. Hope you are feeling better soon!
Safe Journey
Oops spoke too soon, perhaps you might check out the Gemology part of Mystic Board. Sorry I wrote this before I was really awake. Take care.