Crazy dream?!?!??! 10 points?

I dreamt that my friend ( lets call her L) and i were walking to my other friends house ( R ) , it was at night, and there was a graveyard near her house ( like right next to it) anyway, so R and her brother had been playing with the ouiji board or something, and when we looked through her window we saw a red light with a skeleton behind her window and it said , if u open this door ull open the door to hell, and i wanted to leave and pull my friend with me but before I could tell L not to open it, she opened the door and I'm not sure what happend I think we got sucked into the house, and the house was very dark and the lights were broken and it was flickering, I saw R and she was possessed and walking very strange, and i was thinking to myself holy **** what did they do!! and her brother was there too, he was also possessed and then I was looking for a way out but everywhere was dark and then all of a sudden I was upstairs for some reason, I looked down and i saw an empty wheelchair by the stairs and the lights were flickering there too and it was kind of bright!

 and i saw R again and she was walking like a zombie and she was bloody, and I'm not sure where L was. and then all of a sudden i saw myself standing in a cemetery ( the one by her house ) , it was very dark and then I saw myself getting possessed too and my appearance kept changing,  I looked very scary, my face was pale and I was all bloody and I had blood coming out of my mouth and it was on my throat and chest, and i think i was screaming, and i was wearin a ripped black dress i think? And then i changed back to myself and I waS wearing a white dress and my face was all clean and it looked like i was smiling, i looked all innocent ( the kind of dresses that u get to wear at the hospital) and then I changed back to the "possessed me" with blood and everything, i kept changing back and forth really fast,  and it looked like a hologram or something, i was standing beside a grave when all that happened and the grave that I was standing next to was empty/open, but then I saw R by another grave, she was on her knees and she put something over the grave and she was sowing it or something I don't know, so that the evil spirit can't come out again. and I never came out of that graveyard 

And then I woke up,  don't remember what else happened in the dream 

What could this mean?

Thanks