I cried at work today

I cried at work today. I'm going to tell you what happened today. I arrived at work and had to work with a colleague of mine (A). I ​​explained to her that we had 2 containers, one for the weight and the other for the things that were wrong. She immediately started saying out loud: I know that, I don't know if you know, but I've worked here alone before. I didn't pay much attention to the way she said it. After about 2 hours I started feeling unwell, and I asked my boss if I could go to the bathroom. I told my colleague that I was going. When I came back from the bathroom, my colleague went to my place, which is the line manager's place. I let her stay there, because she had already been on the line alone and since I was feeling unwell, I left her there. After the break, we came back to work again and I had to go to the bathroom again. When I arrived, my colleague asked me if I was okay and I told her that I wasn't. She then started talking loudly, saying that I was ignoring her, because I hadn't answered her. I apologized to her because it is very likely that I did not hear her. She continued to say out loud that yesterday I was very happy and that today I was feeling bad and that I was feeling that way because I had to work with her. I told her again that it was not because of that that I was feeling bad. Then for the third time she said out loud and said: there are things about you that I do not understand. She repeated this twice for everyone to hear. I felt bad about all of this and asked to go to the bathroom, but this time it was to cry.

I know that I could have told her that I was feeling bad and that today she would be in charge. I know that I was wrong and I apologized. However, I did not like the way she spoke to me and the way she had to speak loudly for everyone to hear.

She has always liked attention and always thinks that she is the best and since she is part of my family she thinks she can treat me any way she wants.