Insomnia

I have never really understood how I can be so completely exhausted, but so completely unable to sleep. I don't mind waking up at four a.m. or even3:30 if I can fall asleep at a decent hour, but laying in bed for hours tossing around (or trying to remain stil) is quite annoying. Days upon days of this is really becoming too much for me. This is when my mind begins wandering into dark places. This is when I begin to worry myself.