I don't take drugs or under any medications of some sort for that matter. I also don't drink but I've had a few "sleep terrors" episodes before, and a couple of them were pretty intense! One of them was about someone or something choking me with both hands and it felt like it was sitting on my chest. I was fighting it with all my might and I could even hear myself grunting to muster up all my strength to fight it but to no avail. Then, I prayed fervently and that's when it let go of me and then I heard a loud thump on my rooftop. This happened around 2 AM. Another "sleep terror" incident I had was about an old hag clutching my left shoulder with her bony claw like hand and I can feel it's face and it's breath right against my left cheek. I remember not being able to move or yell for help. It was a scary feeling of helplessness. It was so intense that even after I woke up the next day, there was a residual sensation of it's hand on my left shoulder. I've done some research on this and the scientific explanation for it is sleep paralysis where your brain wakes up before the rest of your body wakes up. But there is always this feeling of an evil presence associated with it. Since then, I am not able to sleep unless I exhaust my self to sleep. I normally sleep around two or three in the morning due to these unusual experiences.