how do you get over cringing over something you said or did a long time ago

i thought the key was to have new experiences and keep doing new things but all i do is accumulate more shit to cringe over, plus every time i get into a social situation i'm worried about doing something cringeworthy, which really fucks up my interactions with people and usually it becomes a self-fulfilling prophecy

i'm at the point where i want to kill myself or hide in my room forever

help!