ihatewestseneca,
Some people believe the brain is like a computer and the information that comes out depends on the information that was fed in. Sleeping and dreaming is a bit like the computer de-fragmenting and backing up files. It's your brain organising and reorganising itself. Nothing to worry about. All perfectly normal unless you are becoming seriously disturbed by your dreams. If this is the case it may indicate that there are things that you are refusing to take care of or face up to. An honest bit of soul-searching should take care of things.