For some reason, I can't sleep lately unless it's on my living room couch. It used to be that I'd sleep for a while in my bed, then wake up from nightmares or something random, and not be able to fall asleep again unless I went to the couch. Now I can't sleep, or don't even want to sleep, in my bed. It makes absolutely no sense to me, except that maybe sleeping by myself in a bed makes me lonely. I used to be okay with it though. I don't know what changed. Any advice?