What is in my room? A demon

A week ago I was in my bad trying to sleep (thinking about my future wedding) and I had this nervous energy running over me and I have to pray constantly the whole entire night. I did not sleep at all. It feels like war of the worlds in my room, really badly. I was too afraid to even move, and I just prayed out loud the entire night, inside I felt that that was what I had to do, like I needed to. The next night it was the same thing, only it came when I went to bed, the sensation came to me again and I felt so bad and vulnerable that I had to pray out loud for got (and everything heavenly) to protect me and my house. I slept none those both nights, and it was was same the next night. But during the daytime my room feels fine. But at night when I walk about in my home when all the nights are on, I see black figures move around quickly. I am starting to doubt myself because to me these feelings and sighting are only mine and my parents do not feel them. But when I am in my room at night the feelings that are around in my room are extremely intense and negative that I told my parents that I simply cannot sleep there anymore.
Yesterday a pair of Mormon missionaries came to my house while I was absent (my parents were there) and they let them in and told them about my room. My parents invited them for dinner Thursday night and to let them try to make whatever is in my room leave.
I am afraid because I do not know what the missionaries will say or do to my bedroom.
What if this is just me? Am I going crazy? What do you guys think is occupying my room at night?
Thank you

When I was a Mormon missionary serving in Peru, I was called upon from time to time to clean houses and apartments of evil spirits. A simple prayer is usually all that I did, invoking my priesthood authority. I have also seen people who were under the influence of evil spirits; it was bizarre to say the least. Hatred and and a constant stream of profanity poured out from within them. Their faces were screwed up in a terrible grimace. I have cast demons out of people as well. The biggest problem is not casting out an evil spirit, but keeping them out. In each case, they were invited in. Unless the person seriously repents, they will invite them in again - often without even realizing what they are doing. I guess that part of the problem is that no one wants to be lonely; they prefer the company of devils to no company at all.