I Often Can't Sleep

I seem to go through phases. 

Some nights I'll sleep just fine, and wake up bright an early in the morning.  Then something happens, and for the next few nights I won't be able to sleep.  I won't even be tired.  Then another change happens and for the next few nights I'll be tired, but still unable to sleep.  Then it all starts all over again, and I'll be back to sleeping normally.

There doesn't seem to be a pattern to the phases - sometimes I'll last a month or two before the pattern changes, sometimes it will all happen within the space of a week.

Opalgem Opalgem
36-40, F
Aug 4, 2010