Should I go back to my old job that hurts my confidence?

For 3 summers I have worked at a retail store, and then leave when I go back to college for the year. When I work there, I always feel very unconfident because I worry that the store manager doesn't like me, and I always feel like I am under surveillance by the higher-ups (we all are, but I am extremely conscious of it). Going on the register is also scary for me because unusual circumstances might come up that I forget or never learned how to handle, and I feel so stupid when I have to ask a question. If I make a mistake, I feel so incompetent. I also struggle with social anxiety, so it is sometimes difficult for me to initiate interaction with customers, though I think I do well generally.

I decided that I wanted to get a new summer job because I don't think I'm growing at this retail store anymore, and I wanted something that would make me feel good about myself instead of on-edge. However, I'm having a tough job finding a job, and I have been on break for a month and a half now. I know that there is a 98% chance that working at the retail store is a phone call away... Do you think I should just go back, or keep looking for a different summer job?