I switch over to my customer service voice and script
I put the people around me who are causing me anxiety into a fantasy story where i kill them in brutal ways. This usually helps if the situation isn't to bad, but quite often for me the only way to overcome it is by changing the fear/anxiety to anger, this works in almost any situation but gets you in a lot of trouble, police, mental hospital, social work,normal hospital occasionally if its a group or someone really hard or nuts. I prefer these outcomes to the deep sadness/depression that I feel if I back out of situation or try to push through it and make very basic social mistakes.(This happens a lot). Wow, that covers my whole emotional range too. Acting can help too, pretending i'm someone else seems to lessen my anxiety significantly but obviously you can only use this with people you don't know and are able to keep up the lie with. Not great strategies, i know but i've tried lots of things most recently meditation to stay in the moment and a trauma intolerance course to try and visualise my anxiety as different things and observe it , but I never did well with either.
i kept a journal where i would write down irrational negative thoughts, identify what kind of thought it was (catastrophizing, personalization, etc.) and then write a good accurate rationalization next to that. the idea is eventually the good accurate ones come naturally to you. it didnt help me at all but maybe youre better than me (maybe)