Can you tell me what means?

I had a dream that my lil step sister was posest by a demon and was put in to a computer like moving banner in the sky then I skipped to my and my step mom sitting on my bed in my room we were laughing about something then out of no were it got quit... I knew she was being posest by the same demon that posest my baby sister. I was scared that the Demond was going to hurt me through her because she could easly beat me up but it didn't in sted it was just trying to scare me... It quickly left her body she past out. It came over me like a mass I couldn't see or hear it was choking me trying to kill me or something. I was yelling prayers in my mind it was trying to make my stop. Almost passing out in the middle of the our father it was trying to make me stop saying I woke up.. I was so scared and I'm still scared I can't sleep