Sleep deprivation.

I seem to have fallen into a pattern where every couple weeks I have several days in a row where I just can not sleep. My back is fine sitting, tires easily when standing but is hideously painful when I lie down. This weekend I hit the peak of the cycle of pain. I sleep for 30 minutes or so wake thrash into another position then repeat. I think last night I managed one 3 1/2 or 4 hour stretch. I'd say daylight savings was hard to do, but it wasn't I was hurting too much to stay in the bed anyway. Even the gym at last weeks 4:45 this weeks 5:45 didn't seem that arduous. Of course now I'm so tired I could cry - fortunately work does not require much effort today.