Getting therapy, particularly talking therapy with a qualified therapist. I know this doesn't answer your question exactly, but it'll very likely help you uncov

Getting therapy, particularly talking therapy with a qualified therapist. I know this doesn't answer your question exactly, but it'll very likely help you uncover the root of the anxiety and manage it way better. It's one of the best things I can recommend. If you must go down the self help route, I'd consider looking at physical changes as well as the things your looking for, such as exercise, diet, relationships, getting outdoors, and so on. Good luck.