I am desperate. Do I go back to my old job?

Hello.
I used to work customer service at a supermarket. Loved the team, not the job. I moved into a support work job in march, I was enjoying it for a little while until I wasn’t, and it is exacerbating my anxiety. I was already looking for a new job until this incident happened last week. 2 teenage children I was supervising at work got into a physical fight and it was intense. It’s completely thrown me off, and I feel so desperate to leave. I need to know whether I go back to my old job because it’s embarrassing, my old coworkers were so happy I was moving on ect. I get paid $10 extra at my current support job, but it involves driving nearly 3-4 hour a day and in split shifts. 
So what do I do?
Go back to my previous job, tail between my legs? 
Or stay in my current job and dread it?
I’m also starting study part time in 2 weeks. 
I could try find a new job but it’s proving very hard in my town.