You're welcome. Yes, I definitely know about paranoia as well.

Do you mind if I suggest something? It's not much but for me it's something and you've probably heard it before anyway.

One technique I pull from the toolbox for my paranoia/suspicion is practising the 'letting go'[?] When I catch myself dwelling or obsessing, I shift my focus away from it - just shift my focus away from it - all the time, and continue doing whatever it is I was doing. Because the basic 'themes' which keep entering my mind haven't really changed over the years but I can, at least sometimes, try to look at it objectively as more like clouds floating into my awareness, so to speak. I can either keep staring at the clouds [obsessing/worrying] or I can just look somewhere else and carry on walking along the path - my mood instantly begins to change [a bit]. Which is what you're doing really by watching a movie.

If the mental health field can give us something better I'll let you know, my friend.