Hi, Nyte,
Yeah, I really struggled with the whole "Am I just becoming schizophrenic?" thing for a really long time. But it's been over a year, and I go about my daily life/work the same as I always did (maybe just happier!)--I figure that, by now, if what I see is no more than psychosis I'd be a terrified, stark-raving lunatic by now, but I'm still the same relatively boring person I always was, and no one seems concerned about my behavior (I do keep the talking to spirits on the telepathic level when other people are around!). It was a huge relief when I finally realized that I wasn't losing my mind--mental illness is no joke, and I wouldn't wish it on anyone.
Early on, when I was worried that maybe I was just losing it, I really started to panic one day. I started talking like crazy to D. (see my posts under "Mediumship"), telling him to PLEASE prove to me that it was all real and that I wasn't going nuts because I have a son to raise. I was terrified for a few minutes, and then suddenly I felt him touch my head in this very gentle, reassuring way--it was a perfectly clear answer..."You're fine; I'm here."
I also found this, which may be helpful to others:
http://www.imagerynet.com/book/excerpts/visions.vs.hallu.html
And yes, I do believe that in some instances the "spirit thing" may be responsible for people losing their minds, especially when the people don't have any other support, or don't understand what's happening, or believe the malevolent spirits who tell them that they're messiahs, etc. (They used to try to tell me that D. and I were Jesus and Mary Magdalene in previous lives. Right. Sure. And if you believe that I've got a nice bridge over here in Brooklyn to sell you...

)
Doe