nah, it's just that your sleeping patterns are weird
most things can be explained, for the things that can't, there's no real need to immediately brand it as something supernatural... you're NOT going to call a bat flying in the sun a ghost, same logic applies
ghosts are real when you're sharing ghost stories, watching moves/tv, reading manga/novels, scaring your baby siblings or using it to take advantage of your significant other half
otherwise, i don't like thinking ghosts are real, altho that would explain ALOT of things that goes on in my old home...