I have bad nightmares every night and feel that I am awoken by spirits or ghosts?

I am thirty and still need to sleep with the light on even if someone is staying in my house. My dreams consist of demons grabbing my feet and pulling me off the bed, and green lights illuminating my apartment - while they are, I'm paralyzed and can't do anything. I also have dreams / woken moments of ghosts terrorizing me - is this just a dream or more??