Lol, i can definitely relate to avoiding the news, I would often do this for years, muting when coming on the radio etc, always expecting news of some major political disaster or local war or even normal stories which could spark off paranoid thoughts.
I took Sam-e for a while and i think it worked. It should in theory help with your situation and might be the ideal thing to test for a week or two before considering other options like an SSRI, as it could in theory provide similar benefits with much reduced side effects and dependency issues.
I had all your issues at very bad levels as well at one point and the only thing that really helped me was getting on an SSRI, paxil for a few years. But all my issues where caused by MDMA abuse and OD's so the area of damage was obvious, Serotonin. If you can do some research to determine why anxiety might be caused by Lyme's and through what mechanism, that would be very helpful in determining the best treatment.
But yeah Sam-e seemed to show a lot of positive data and results and seem to be quite effective and powerful, so its worth trying. Its not the cheapest supplement though
Self medicating bottles of vodka everyday was making things worse and even the strongest benzoz didn't really provide much relief, was great for anxiety and relaxing but didnt help with paranoid thoughts and sleep, so it wasn't worth taking daily.