I started going to a new therapist a month ago, for my depression and anxiety mainly, but I worry a lot about things. I'm at least a little paranoid too, probably more than I think.
Anyway, basically the whole approach that she is having me take is basically reading on thoughts, emotions, etc. And to work on my thoughts. So every time I starting to worry about something, or just have one worried/depressed/anxious thought, I recognize it and kind of analyze it. I basically work through it. And it does help. It especially helps to work through certain thoughts/situations with my therapist.
Supposedly writing can relieve stress, so maybe writing down what's bothering you, and then working through it on paper, maybe even turning it into some kind of personal paper/article or something might help.
But yeah, I agree with others, it would probably be a good idea to cut some things. Especially if they are crazy conspiracy theory sites/youtube vids that most likely aren't true anyway. If they aren't true, or if you may never know/knowing won't make much difference anway--AND it causes you anxiety/distress--what's the point in continuing to read/watch these things?
Just some suggestions. I guess they are very simple/basic and you probably already know them, but I figured I would go ahead anyway and post them. I hope you find some things that work for you and work through your paranoia/anxiety, and become less paranoid and anxious.