Demon or not?

My friend Jordan and I were in the kitchen talking. And I sent her to my room to get something... that's when things started.

1. Jordan opened my bedroom door, and felt something run across the length of my room.
   
2. We were then talking about what she felt, when we needed to go in my room again. We felt like it was okay, nothing irregular. Until we looked around, a couple things were out of place. My fan was turned around, and a cot I keep in my room was moved away from my bed.
   
3. We left the room again. And wanted to chack things out, as you can imagine being two young girls at home alone we were scared by now. When we tried to open the door, it almost locked.
   
4. I needed my jacket from my room, so we tried to open the door... but it locked... or so we thought. So my aunt picked the lock, and opened my door, then she unlocked it... but actually it wasn't locked to begin with. Then we left. When we get back things get worse
5. Cabnets open themselves.
   
6. We were in the bathroom doing our hair, when we hear something, so we lock the bathroom door.
   
7. My dog starts yelping, and is randomly in my mom's room. We don't know how the dog got in there since the door is always shut. (and we are still alone at this point)
   
8. After we finished getting ready we went into another room, started a CD, then went outside leaving the room's door open. We come back in a little later, and the door is closed.
   
9. The same door closes itself again.
   
10. We weren't alone for this, my mom was home but she was in her room. My friend and I were cooking dinner, and listening to a CD on my sterio, and it ended. Then a song starts randomly playing. The lyrics were 'Now I'm in hell.... I'm all by my self... All by my self... All by my self... All by my self... All by my self.' We went into my room, and the sterio was off, we even listened to every song on the CD, none of them were it.
    

So.. You decide Demon or not? Comment on what we should do...