Ugh, what's wrong with me?!

I don't know what the problem is. This is night #2 where I can't sleep! Last night I couldn't sleep and didn't want to read, so instead of keeping DH awake with the TV in the bedroom, I came out to the living room and ended up watching 3 DVR'd episodes of CSI (from this past April).

Tonight is the same story. I went to bed, fell asleep, but unfortunately drank a lot of tea before bed and had to get up to use the bathroom. Once that happened, I was wide awake. I tried laying in bed and counting to 200 and each time I stopped to think about something, I'd start over. Finally, 40 minutes had passed and I STILL wasn't asleep. Don't feel like reading, don't feel like watching TV. I have to work out tomorrow, study for an exam tomorrow, TAKE the exam tomorrow and here it is, nearly 1am and I can't SLEEP! The sad thing is, I'm tired, I just can't go to sleep. When I'm laying there, I'm too hot with the covers on and too cold with them off (or with just the sheet on). It's like I just can't get comfortable.

I have a headache, I seem to be worrying about a lot of things, and I don't know what would settle me down enough to get some shut eye! I need it badly! I guess I'll surf the web for awhile and see if that helps? *sigh*