Sleep Paralysis and Something else?

[otakuhime]

Well I know I suffer from the occasional sleep paralysis, you know the 'you wake up but can't move' deal, but usually I suffer from a reoccurring kind of dream different from my normal nightmares (attacked by wolves, zombies, etc and just waking up scared). In this kind, it starts out normally but later on a demon or man shows up and starts to crush/squeeze me around my torso (constriction) or hold me down and jammed something (their fingers, elbows, hard objects) into my side. more often than not, I realize I'm dreaming and try to flail about to wake myself up but I'm paralyzed however after attempting it for a little bit I usually wake up. however for a split second/couple of seconds after I wake up I can still feel the crushing sensation which makes stand out from my other nightmares.

does anyone know what this is? or is it just a different kind of Sleep Paralysis, because most people say that they wake up, and are paralyzed; however, in these I see the demon in a dream, I'm paralyzed in a dream, I wake up, and and then un-paralyzed like a second later.

I get these kinds of nightmares about once a week.

[Unknown1]

You say you see the Demon sometimes..
Do you remember what it looks like?