I feel like I'm going to get fired because I cried at work

I'm a teenager, and I just got my first job. I am a month and a half in. Yesterday, my boss pushed me to the point where I had to go to the restroom and cry. She didn't see me, and I'm glad, but when I went to talk to her about it today, I let a tear or two come out. I hate it. I feel like they're not going to keep me anymore.