abusive boss

i work at a fast food place happened was I wasn't taking orders on speaker 2 because we were running behind and I was making drinks and she yelled at me saying if I need help ask so I did then we slowed down and I was taking my own orders again but then we got busy again and I asked for help and she looked at me with a bitch face saying um we can't help you do it yourself there's only 2 runners it pisses me off she totally contradicted herself then after we slowed down again another one of my managers asked why I was in a bad mood and I said I'm fine it was just better before I started working and then I has to talk to him in the office and he wasn't mad just let me vent about my boss and then she walked in and was like you know why I had you guys talk in the office right and then I said I don't understand why I get yelled at for something that others do and not get in trouble for and then looked out the window and she said don't roll your eyes at me and then just started bitching me out and I zoned out I was crying and she screams at me shacking her finger saying do I make my self clear I was literally crying my eyes out and then she glared at me rolled her eyes and walked out and slammed the door the manager said okay calm down. And then come back so I was and she was about 5 min later are you ready to actually work I said I don't know and then she said okay clock out and leave but I need the hours so I was on fries for 45min people were asking are you okay and I couldn't talk or I would have started crying she's such a bitch sorry it's so long another thing is I have major anxiety and she knows that I need advice what should I do about this I'm planning on quiting after I get a new job and another thing she has yelled at me like this before