There was a time in my life that I experienced this phenomenon for several months in which I had no idea what was going on. I've been all over the map on this, in trying to figure it out. My mind went to all kinds of places, at one point I thought someone was breaking into my house. At another point I thought maybe I was having a psychotic break or something.Equally. You could also jump to the conclusion that it's sleep paralysis, or something along thes lines, when you don't know. Agreed?
Then I stumbled upon a sleep study in my desperate internet searches to figure out what was wrong with me. It was a sleep study being carried out on sleep paralysis. When I read through the symptoms and explanations, every single one of mine was listed. So, I signed up for the study. Went in for testing and found out that it's called sleep paralysis.
It could also be sleep apnea. I'm not a doctor, so I can't really say.
I "dismiss" demon activity because the evidence doesn't indicate to me that demons are involved.
All the evidence I have indicates that it's organic in nature.