I have social anxiety but once someone talks to me I can get along with almost anyone

Most of the things that will probably go through your head are along the lines of "what do they think about me?" "why are they laughing?" "I don't want to be here between these people" "avoid contact".
That's mostly what goes through my head but I still somehow manage to go through it by the thought of "screw them all idgaf what they think or do"