Feeling Overwhelmed and Anxious About Work Mistake

so I recently messed up at my job by using a manager’s authorization numbers when I shouldn’t have, and I feel like I disappointed my managers. the conversation we had ended weirdly, and I’m worried when I go back for my next shift, they’re going to bring it up again and I’ll be yelled at. the thing I’m having trouble with is how I can’t seem to calm down. even if I do get in trouble, it’s not the end of the world. but I’m so upset about it and scared that my managers hate me. I can’t stop the thoughts telling me that they are going to fire me, and that I’m a bad person. I feel overwhelmed, like nobody likes me, everyone sees what bad of a person I am. I hate myself so much right now. and all because I was a little lazy and didn’t double check something with my manager. I feel physically ill over the whole situation. I don’t know what to do. I feel like this isn’t a normal way to live. I can’t handle my emotions well at all anymore. I need help understanding what is going on and how to feel better :(