Sleep Paralysis...

[Aegon]

There are two forms of sleep paralysis, one that occurs as you wake and one that occurs as you fall asleep. I get the latter very frequently. Right as I drift into deep sleep where I dream, I have a nightmare. I become aware that I'm asleep, but I can't open my eyes or move my body. Since my eyes are closed I often don't have any visual hallucinations, but certainly auditory ones. I think I'm screaming at the top of my lungs in response, but I'm actually not moving at all.

before I go to sleep always prevents it from happening.