Hmmm, well maybe your sleep problems are due to ADs. Talk to your doc. I know that sleep problems can be a problem with ADs, how severe and how long they can last is something you should talk to your doc about. I bet you're just worn out from the sleep problems.
I typically only get 7 to 7.5 hours a night, too. I didn't take a sleep medicine like Ambien. I took a small dose of Xanax which was enough to relax me and lull me to sleep. You can even take one Nyquil or Benadryl which I do sometimes when I get menstrual insomnia.