This past weekend I was feeling fine. On Sat, I went for an hour ride in 111*F heat. On Sun, which was only in the low 100's and overcast, I spent the whole day cleaing out my garage and lifting weights. I was okay. Had some dinner (fast food - something I rarely, rarely do), watched a little TV and went to bed at 9:40 PM. As I hit the pillow, I suddenly felt so dizzy and a bit nauseated. I got up at 2:30 AM and couldnt' maintain my balance. I felt very dizzy and very nauseated. Went back to sleep. I got up at 5:00 AM for work and felt even worse. Any movement of my head would make me really nauseated. The only other time I've felt this bad was when I was drunk, and I mean really drunk - did wayyyy too many vodka shots at a party. So I used the bathroom and within a few hours, I felt okay like 90+% better. I can shake my head, spin around, lie down, get up, etc. and not feel nauseated anymore. Any ideas? All I can think of that caused this is the fast food I had last night, but my parents also ate the same thing and they are okay. And I don't particularly care to go to the doctor if I'm feeling okay now.