It's probably not a great idea to go to sleep really early. I usually go to bed somewhere between 11-12, and I think going to bed a 7 would be a mistake. Veg out in front of a computer until 9 if this happens again.
Also, if you wake up at 2, don't get up. Lie in bed and tell yourself that you are still recovering at about the same rate as you would be if you were sleeping. The funny thing is, I have felt like I was lying in bed not sleeping but garmin tells me later that I was. It's really common to have continuity of thought across sleep cycles. On longer rides, when I just get one 90 minute sleep cycle, I have experienced this a lot. It's like the sleep didn't happen, although I know it did because of the clock.