I saw a very scary
movie when I was about 13 and had trouble sleeping for months. What finally helped me was realizing that the worst thing that could happen was that I would be killed. And if that happened then I would be in paradise with God and what was so bad about that? My parnoia left me once I came to peace with that scenario.
Do not be afraid, God is greater than any ghost or monster or boogie man. Pray for peace.