My Nightmare

I don't know why it started. I just... I had this nightmare one night, and it hasn't gone away. It started back around June of 2017. I thought maybe it was because of stress, because I've heard it's common for people to develop stress nightmares right before a big test or interview, which I had finals coming up, so I figured it would pass once they were over with. No luck. Sleep deprivation and paranoia have become a frequent occurrence since this nightmare. Let me... let me just tell you about it. Also, this goes into great detail, so apologies if this ends up being really long...
So... I fall asleep and I'm not sure how much time passes, but I open my eyes and find myself in this small, white, empty room. Well, empty except for me and a white bed. In front of me is a door with a small window that exposes black nothingness. I never actually try and open the door because subconsciously I know it's locked or stuck and it won't open, so I just sit in the bed. I get this strange feeling that I'm not alone, that there's something else in the room with me. I get a chill down my spine when I see these long, skinny fingers expose from the end of the bed. I can't move, it's like I'm being held in place by an invisible force, making me stay still on the bed. I soon see a figure emerge from the foot of the bed. He looks horrifying. His jaw looks as if it had been ripped and is now hanging down to his chest. His face has two black holes where his eyes used to be. His skin is almost like a gray color. His limbs are all bent backwards, like how a bird's knees bend backwards. He slowly stands, him being a lot taller than I had imagined. He stares at me with those black holes, but he doesn't do anything else for a while beside just... stare. My heart is already racing. I try and move, but I still can't. I'm sweating. I'm panicking. I don't know what to do. After a few minutes, or hours, I'm not sure which, passes by, he slowly starts to move, climbing atop my bed on all fours, slowly crawling towards me. He gets only a few inches from my face and continues to stare. After a few more moments, he lets out this loud, blood curling screech. That's when I wake up. I quickly sit up in my own bed, sweat trickling down my face, my heart's racing, almost to the point of a panic attack. I don't know what to do anymore. I've already talked to doctors about it and therapists, but even they aren't sure what's causing it. I was hoping this thing would pass but it hasn't. Sometimes, it doesn't scare me as bad as other nights, but I never know if it's gonna be a tolerable night or not. It's gotten to points where I'd beg my friends to stay on the phone with me while I slept because I was so afraid. I've cried myself to sleep on other nights because I was so scared to fall asleep. I don't expect anyone to know how to help me. I just needed to get this off my chest. Thank you for taking the time into reading this.