I have had dreams that frighten me, and I realize oh crap not that dream again! Sometimes nightmares can repeat, unfortunately you dont know this until it happens :P I listen to techno before going to bed. Maybe even those sounds that are said to get rid of headaches. Maybe it could be where you live?? Sometimes certain environments can help you sleep. Mine is Florida cause it's quiet to me. Try to find the source of the problem. If I'm no help at answering your problem, sorry cause I'm just putting down random things.