my rule of thumb is that if a ghost/monster/demon ever bothers me I'll whip my richard outthey won't bother me if I have my richard out
the ultimate ghost repellent
supernatural stuff isn't realyou're overreactingcalm the heck down
Sleep Paralysis
The thing you experienced was sleep paralysis. It occurs when you have entered REM (rapid eye movement) sleep, but suddenly wake up. Since in REM sleep you experience dreams, in order to stop you from physically hurting yourself as a response to the dreams, your body gets loaded with paralyzing enzymes. When you wake up at that point, your mind is still being stimulated to dream in such a fashion, but since you wake up in a pitch-black room completely unable to move, you associate that with things you see in nightmares. At that point you basically start wildly hallucinating like you would in a dream, but awake at the same time.This is also a danger of attempting to achieve lucid dreaming. You may scare yourself awake once you realize you are dreaming (thus achieving lucid dreaming).
supernatural stuff isn't real