Night Time Visitor

I have always been interested in the paranormal since I was little, however the only times I would go "looking" for it was when my parents and I went on retreats to haunted locations like ghost towns in AZ or the Queen Mary in Long Beach, CA. I have been visited before as a child, but I'll save my stories for other postings. Let's start off with the most recent.

Just recently I have been experiencing something that I cannot understand! I need some help with this one because I can't sleep at night without having a light on. The way my room is set up, you walk in and to the right is my walk in closet, to the left is my bed with the foot of the bed being closest to my closet, and since I move back and forth from California to Portland, I have boxes all up against the back wall straight ahead, and my sliding glass door is to the right in the corner.

Anyways, when I'm watching TV at night before I go to bed, I always get the feeling that something is moving from the back of my closet to the front of my sliding glass door. I'll look over there, and you can see an outline of a black shadow that looks like it's crouching, waiting to pounce... Then when you look in the closet it looks like Spiderman almost, creeping in the corner. Or I'll look at the door of my closet and you'll see an outline of what looks like death (The grim reaper). But it's like they are wearing a hood or something.

Anyways, I was trying to ignore the feelings and get some sleep because it was 1 in the morning by now, but all of a sudden it felt as if someone had taken a vacuum and sucked all the air out of my blankets! I was trapped under my blankets! Then I felt something sit on the bed and creep toward me as if they were ready to pin me down or something. I freaked out so bad!

I tried to scream but I was so terrified, and I tried kicking the blankets off of me but they were sucked down on the bed so tight I couldn't move! So I made myself get a grip and I used all my force and got the hell out of there! I left all the lights on, my TV and my cell phone in my room on because I couldn't go back in there.

I keep having these experiences almost every night and I don't know what it is. Even sometimes when I look at my closet, there's this huge haze. Almost like a grey haze covering the closet door and that's when the feelings of many energies come into my room. I feel as if there's something curious in my room, but it hasn't ever happened to me before a couple weeks ago. When I see the haze, you can hear footsteps on the carpet, like there's someone walking around in my room! I have to turn the TV up because I can hear breathing sounds sometimes too, even during the day.

Can someone please give some help on what this might be?

My room is the coldest room in the house. You have to bundle up just to slightly feel warm! Any advice helps, thanks!