I need some help guys. I've been to the doctor twice in the past three weeks and I have another appointment tomorrow... I have a ridiculously long list of symptoms and I can't seem to pin it down... Can you all help?

First a little background. I am a full time student and, unlike most of my classmates, I do not carry all my books in the conveniant form of a laptop. I still use the old fashioned book and notepad system. I'm also a full time server in a restaurant. Finally, my boyfriend has a two year old daughter that I help take care of. I understand that this can account for some of my pain, so I decided to write the background...

So, here are my symptoms:
-Constant back pain
-Constant headache
-Hypoglycemic attacks (extreme stomach pain, nausea, lethargy, etc.)
-chest pain (there is always a dull ache, but once in a while it will become sharp and make my left arm tingle. Also, I felt a lump in my left breast, but it has dissappeared...)
- tenderness in both breasts
- stomach cramps
- dizziness/lightheadedness

And recently, I've been having allergic (I think) reactions to a perscription (Macrobid) given to me for a UTI. I took the perscription shortly after eating along with two advil for pain (the doctor told me to take that when I'd had a bad reaction to Naproxin). About twenty minutes afterwards, I became extremely lethargic and, essentially, passed out for about four hours. I don't remember it, but my boyfriend says that he couldn't wake me up and when he could I just pass back out mid conversation. After it wore off, my stomach cramped up for another few hours and I fell asleep numerous times (basically every time I sat down). I ran a low-grade fever that night and the next day.

Because of the reaction, I stopped taking the Advil, so now I am pretty much in constant pain. I'm still taking the perscription, but I still get cramps, dizzy, and very lethargic when I take it...

I know its a lot... but any ideas?