I'm taking pain medication post-surgery (an opiate). It causes me to be very sleepy. So sleep has been decent lately. Today is my last day of the med, though. For the past few weeks when I can't sleep I take melatonin. I find that if I take it every night it stops working. So I'll take it for, say, 3 nights then skip a couple of nights.

I sleep a lot, in pieces. 3 hours here, 3 hours there, awake and up for an hour in between. If I don't get enough sleep I'm a mess.