if u have headphones, put them on and blast music that u don't need to think for (i like hard music like rock, rap and shit like that), get up, get some water and take some deep breaths. Do a couple of stretches if ur up to it, if not rubbing my chest in a clockwise motion works for me so give that a try!
i get where ur coming from girl, i left my last place because of exactly that. it felt like i had to be on top of everything at once with little to no support and my boss would just keep demanding more. i would literally have panic attacks just like u, all for my boss to basically call me lazy cause i wouldn't work overtime for free
i get im just some rando online for u rn, but def consider looking into getting another job. There's only so much we can do in a 40 hour work week. We're not robots, we need to take care of ourselves mentally and physically to be able to do our jobs and if u can't take care of urself u just simply won't be able to do ur job sometimes 🤷♀️ and some ppl just don't get that cause they live to work fr