I've had trouble sleeping for a few years now. I'm not sure what caused it. I have to either listen to music for a long period of time or take sleeping pills in order to fall asleep. And when I do get to sleep, I almost always have nightmares that I can't remember. I'll wake up scared or tense but not remember what I was dreaming about. I think it all must be caused by stress, but it happens almost every night even if I'm in a good mood when I go to bed...