Hi Carole, I agree with Dr. Jean that there's some correlation between watching or reading horror books/shows, and maybe what's going on with you.
Last night I had a nightmare thinking that a group of Pro-Choice people were menacing and harrassing me, and in the dream I felt quite intimidated. However, I did attend a pro-life rally for the prevention of the passing of Bill 371 in NYC a couple of weeks ago....so I see what my subconscious fears were by attending the rally, and why I might have had such a strange nightmare as that! There probably in most cases always is a rational explanation as to why we have nightmares; it's about fears and insecurities lurking under the surface IMO.