venting about paralyzing fear of getting in trouble all the time

ive never had any problem at my job in over a year that im working here. yet, everyday, i come here and am absolutely paralized by the fear of messing up, of someone yelling at me for doing something wrong, my job is REALLY high responsability job, i have peoples lifes at my hands (not literally but almost) and im aware of that and i do all i can to maqke everything right. but i know im human and sometimes things dont workout, we forget stuff, we mess up. but even tho i know that, i cant accept it for myself. everyone can messup BUT me. i have to know everyhting, and not forget any deadline, and i simply have to know everything. why ccant i allow myself to make mistakes? i fear its because i think in my day to day life, outside my job, i feel like such a burden to peoples lifes that i just would like to not be that at my job. but my crippling fear of messing up causes me to not sleep well, then i come to work tired and it obviously will increase the risk of messing up. then i get demotivated. i just will procrastinate all day so i dotn have to be faced with work and the possibility of failure. i feel like im going insane just by writting this.... anyway i think i just wanted to let this out, since my next therapy appointment isnt until de end of the month lol