Hallucination, sleep paralysis, lucid dreaming, separation from reality... Whatevr you wanna call it

I'm a 20 year old male, starting happening about 2 years ago. Here it is. I too have experienced similar sleep hallucinations. Usually happens between 15-30 minutes after I last remember being fully conscious in reality. Doesn't happen frequently but usually occurs more than one if it does. I feel a wave of shiver/vibrations across my body. I'm fully aware that something isn't right. Almost everytime I'm in the exact position/scene as I fell asleep in. Right away I feel fear slowly creeping up on me. All I want to do is wake up cause I get a feeling that the longer I'm in this conscious limbo between reality and dreaming, I become further endangered. So I focus everything on trying to not let it go on. The weird thing is it's not a dream, it's like the stage of entering a dream (more like a nightmare in my scenario). So I don't necessarily "wake up", it's more as if I fought this terrifying feeling off, and return into reality exactly the way I was while fighting. For example, I'm laying in bed, I close my eyes and notice myself feel really tired, and at this point I know it's happening. So I quickly open my eyes but it's really hard to keep them open, and I try shaking my head to regain full motor control cause at this point I'm helpless. I have a decision to make either I go along with this terrifying feeling and see the outcome which for me is practically impossible to overcome. Or I try to get back to reality which I have usually do after 30 seconds to a minute, sometimes harder than others. Could be some form of sleep paralysis but there's never any lucid dreaming beforehand. All I know is that I don't want to go back to sleep for the rest of the night cause I don't want to feel the way I do when in this situations ever again. It's just to much to bare. There's never anytime for me to change it into what you'd call LD and be able to change the scenery or whatever the case is. My first reaction is to get the hell out of this paralysis type hallucination. The worst case I had so far went a little like this. I'm in my dorm room at school and I enter this realm of consciousness separation from reality to dream. At first I completely couldn't move a muscle but slowly gained enough motor control to roll off my bed and start to crawl towards my roommate who was located on the otherside of the room. I seeked him for help but as I arrived at his bed I noticed his bed was positioned differently than in reality, and instantly it switched to where it was suppose to be. I remember asking him to help me but he responded by laughing in my face. At this point I couldn't handle anymore and came back to reality. It was probably the most terrifying thing that I've ever experienced even though it didn't involve much to be a afraid of, if was the feeling more than anything that was so vivid. Anyways that's my experience with this suction into this foreign realm. Please tell me what you think.

Definitely sounds like sleep paralysis. A LD doesn't have to happen before sleep paralysis. How often does this happen? My best advice would be that when this happens just try to become calm so that you can either wake yourself up or turn it into a LD.