sleep... who.. me?

So let me explain that title.... I've been going to bed latley sleeping for a few hours and waking up and staying up and then going back to sleep hours later for an hour or two.... its just not good for me.. I need to sleep for 8 hours straight.. Anyways and I'm a little fearful to sleep to because I dream everytime I sleep... and not always good dreams just weird mostly and I don't like them.. Because it causes me to not sleep.. And I don't know and now I don't know if I can sleep.. I don't know... sigh.........