Have you ever had sleep paralysis?

It's terrifying. After every time it happens, I always think that the next time can't possibly be that bad, but it always is. Each time is just as bad as the last. I'll wake up in the middle of the night, and I can't move. There are voices whispering in my ear and a face always appears on my ceiling. Every single time, it seems real as ever even though there's nothing there.