I think I'm dealing with possession? HELP PLEASE! This is a true story.!!?

Okay, so last night I woke up at three o'clock. I was up for an hour, & I was watching T.V at like four. & I was watching my show, & I feel into a deep sleep. I didn't even mean to. It was like I was in a trance & someone snapped their fingers & my head dropped. It was a forceful sleep. My dream was really disturbing & it wasn't that long. I got home from school, & someone was in my room. It was a guy from my class, & he started to attack me. I woke up from fear. My mouth was open gasping for air, & my back was arched. I couldn't move my body. It was like I was paralized, I wasn't the one controling it. I tried moving, & nothing happened. I tried screaming, & nothing came out. I'm so scared, & I don't know what's going on. I told my mom about it, & she believes me. She said we need to get our house prayed over because lots of ghost incidents have happened here. Well, not ghosts demons. So, please help! What do I do, & what do you think is going on!!