My sleep pattern is really odd, even in sober life. I usually am asleep early and awaken a couple times a night when I get up and do something until I feel I can sleep again. Then I'm up by four or five in the morning. I'm sure if I stayed up later I might wake up less, but when I'm tired I let myself sleep. I have gotten used to it. One thing I don't do is just stay in bed when I am awake and let my mind run.