Not that I advocate any kind of sleep aid, but in a case like this might I suggest Melatonin? It's herbal and very mild. I had that same problem for a while and that helped me stay asleep all night and wake at a normal hour.
If you are feeling too sleepy and tired then do something to help yourself.
T19 M15 S19 XH47 M43 bomb12/4/07 PA5/07 S12/26/07 D final 11/17/08 Back together with no defined R 05/2010 confused....to say the least!!!