Thanks a bunch guys! I actually did a little research last night and I guess Ambien is supposed to help you fall asleep, but doesn't really help you stay asleep. It'd probably have the same effect as the Tylenol PM, where I pass out fine but wake up feeling really drugged about 10 times a night anyway.

Pretty sure I can't stay asleep because I'm not allowed (and really physically just can't) sleep how I'm comfortable. Hopefully the doctor will be able to help today. Or maybe after a few weeks of PT (soon!) I'll have the core strength to roll over in my sleep again