[jonno123]

I’ve had this too, and only when on my back. I had a pounding sensation in my head (heart beat), an ominous presence, and the feeling that I’d die if I didn’t force myself awake. I’m convinced this is related to sleep apnea. I try to avoid sleeping on my back now.

[techntoke]

Just mentioned this too. Do you feel like you're not getting enough air essentially?

[jonno123]

Yes, it feels like I’ve stopped breathing for a minute or longer (which might actually be the case). On a few occasions I hear screaming, which I believe is my brain trying to wake me up due to low oxygen.