I was/am in the same boat. A year ago, I was getting up every morning at 4:25 AM. I would toss and turn until about 5:30 AM, only to have my alarm go off at 6:00. I had no problem going to sleep but I had an issue staying asleep. It really started affecting my life as I was constantly tired, had no energy and was always on edge. I went to the Dr and she actually gave me a 10 day supply of sleeping pills. She said that my natural body clock was off (due to stress as I was going through a stressful situation at the time) and I just needed to get it back on track. I ended up using 3 of the sleeping pills and it worked. I would not recommend sleeping pills for everyone as I know they are highly addictive, but they worked for me.

Recently, the same thing started happening again. I think it's because I've been exercising at night (9:15-10:00) and I have a very big presentation for work coming up that I'm nervous about. I'm hoping that after the presentation, I'll go back to normal.

I do find that when I wake up, I'm usually extremely hot so it could have something to do with that as well.