Memories real or fake

Still trying to get a grasp on the why of all of this. Sometimes when I am fighting to stop the dreams I keep my mind busy by analyzing the content and trying to figure out why it is or where it comes from. It seems that they are mostly surrounding certain scenes. Making up a story to either start with that scene or get to it. Like taking a snapshot and trying to imagine what was happening before or after the picture. The crazy thing is that I didn’t take the picture. Or I don’t remember taking it. The scenes/images that the dreams surround are the biggest mystery. If I could remember, did I see it in a movie? read it in a book? or live it in a repressed memory? I fear I am driving myself insane trying to figure it out. You wouldn’t believe the options I’ve considered. Mind control project projecting images in my head, seeing into a parallel dimension, etc. The not knowing is the hard part. How do you fight an unknown enemy? I can’t ask anyone for help. I have but they either didn’t believe me or had no clue how to help.