I'm absolutely terrified of the customers and my bosses and I've been on the front counter for almost a week. Every loud noise or raised voice makes me jump out of my skin. I stutter and shake. I feel all this nervous energy and I have no idea how to channel it. Working almost makes me feel manic, I was wondering if anyone knew any good coping strategies to help me. I show up early and try the best I can but everyone notices how jumpy I am. I get these self defeating thoughts in my head.

"Oh he's going to fire me right now if I mess this up."
"My bosses hate me."
"I'm doing everything wrong."
"I have to do better than everyone, I have to stand out to keep my job."

I'm pretty new to this job and it taking me some time to get used to everything. It's a fast food restaurant and I am trying to be as respectful as possible and polite to the customers. I don't speak loud enough. I just feel so terrified that I'm going to get fired. I obsess about it.