Borene,
Like everyone else, welcome to fibroland! You'll find wonderful people here. Hey, look! More emoticons! LOL-OK, sorry, I have a short attention span.
Anyway, back to your problems. I was in a similar situation where I was "terminated" (why don't they call it what it is? FIRED) by my employer. It's really a LONG story as to what happened, but what it comes down to at the end of the day is that yes, I was ultimately fired because of fibro (I didn't know I had fibro at the time). Sera is right-most employers can fire you without giving you a reason (hence, the "at will" employment). I don't know what your job was, but I would definitely do your homework on what you should do. Have you considered going on short term disability? That's what I did. BTW-speaking of crappy deals, I was "terminated" the day after I went on disability.
There are a lot of attorneys that will give you a free consultation. However, you may soon find out (like I did) that there are a lot of loopholes in the system. I always tell people that I was legally "illegally" fired.
I don't know if my babbling helped, but I do hope you'll feel comfortable enough to come here if you need to vent. I think we all understand how stress throws us into a flare.