Oh yes zombiette,
I most DEFINETELY hear you there!! Classes and evaluations of any sort are too bloody stressful. I'm in the same boat, I would love to do it, but I can't.
Something that is kinda working for me is going out and getting exercise or finding some time to go to the mall or anywhere where there's people (unless social situations stress you out, then I'd recommend watching a funny movie or reading a NON school-related novel.).
Try to take care of yourself - and I know you'll do fine on your exams - you're smart, and you're studying too!!
((((((Hugs))))))))