haunting nightmare.

I've been getting nightmares the past 2 nights. They've been haunting me since. On saturday night, i had a dream about a murder case. The people in it were people who i knew. But the most haunting one is last night's. I dreamt the a friend was possessed and death case started to occur. I don't want to enter it in because i don't want to have this as a memory. But all i can now is to pray. The nightmare is overwhelming me and i can't seem to focus when i study. Even right now, the dream is haunting me. The scenes keep flashing in my head.