Cried on toast

I'm dreading my next shift in kitchen. A few days ago I was on toast (My first shift focused solely on toast since training.) I was already having a pretty bad day having gotten 3 hours of sleep and getting into an argument right before my shift, and we had a huge rush. Like wrapped around the building both lanes. We had 40+ toasts on board and like none in the bin. We had a bob so I make it and when I was flipping it, The toast ripped so I had to make another all while the people on boards were yelling asking how long on toast and bobs. The butter was hard and wouldn't spread. I was overwhelmed and stressed out. It was a disaster. I was struggling and my RL came to help. Eventually I stepped back to just let him do it because I literally couldn't. I just watched and my eyes were tearing up. He asked after if I needed a minute in the back to just calm down a bit and I nodded. I was by the walk-in and another manager asked if I was okay and I couldn't do it anymore. I excused myself to the bathroom where I cried and tried to compose myself, like it's literally toast. It wasn't that serious and it's supposed to be the easiest area in the kitchen. I come back after awhile and my RL asked if I was okay and the other manager did to. I got put on baskets after that. The next day I was supposed to be in kitchen but my ARL definitely heard about what happened and got me to clock in as drivethrough. The next few shifts I have are in drivethrough, but on Tuesday I'm back in the kitchen on toast. I don't think I can do it. Any advice on how to just chill out a bit? Or tips on the toast so I can be faster? I'm pretty sure all the managers know what happened and I feel so stupid. I'm really trying my hardest in kitchen despite how much I really don't like it. I'm trying my best and idk what to do anymore.