Thats [sleep paralysis] a demonic attack that you described. I've experienced quite frightening instances of this. There have been several times taht I've felt a presence and I couldn't move at all like your talking about. One time that was little different I could felt as though an outside force was molesting me. I saw a yellowish haze hovering just below the cieling. I cried out for Jesus and the I woke up. I could never forget that, it was freaky. I know sounds unbelievable, maybe i'm psycho or maybe it was a dream. Who knows?