Welcome to PC. I can't give you any advice on beta-blockers, but I just want to welcome you and give my sympathies. I'd recommend going to a therapist, but I know that's too hard for you at this point. I have a therapist, but I have trouble opening up to her due to my anxiety. And from what I've read, you have much worse anxiety than me.
Just wondering, why did you move to the U.K.?