dido, in your case and in cases of people that are sensitive to these things, I can see how they would be disturbing, what I meant is that to people like me and others here who no longer believe in the existence of the biblical Satan character or his demons it is quite amusing. I used to believe that demons at times bothered me when I had these vivid dreams where I couldn't move and I would feel their prescense and would try to say Jehovah's name (that's what we were told to do) but couldn't, anyway, I would wake my husband up making these weird noises and really freaked out, thankully I haven't had any more of those. I read this article on the web about sleep paralyses and it describes exactly what I felt, my mom also suffers from this but she is sure it's demons (she's a regular pioneer and has had this problem since she was a little girl), and it is hereditary, what they said is that what you will see is usually what you fear most, it's a very common thing, and many people like me confused it for demon problems. I was very glad to have read that, together with researching about the Satan beliefs and how they evolved to what is common belief now, I am glad to be free from those fears.
Love and Peace to you dido,
IC