i want to quit my job

im a cashier., and i want to quit my job. 

i had a incident this weekend when i was closing the store, the other day, and i don't think i can handle a holiday season with customers. it isn't worth my mental health or safety when im just trying to do my job. I'm paid to help, bag, and work with the public. but sometimes working with the public, just isn't for everyone, and i do not think it is for me. I want to try and find a new job, even if it still requies working with the public, i want one where im not interacting -as- much. Ive even thought about going into janitorial work if i need to.