Stood up for myself in the library

Stood up for myself in the library I went to the public library and was making some pins with a young girl I am mentoring. The lady (who was very nice) asked us for our names, of course, I struggled with it. Another girl, who wasn't working there was like "oh did you forget your name?" Now, I had never had any stranger talk to me like that. Most people never make rude comments, but this girl was a bitch. So, I straight up told her "No, I didn't forget my name, it's because I have a stutter." It felt strange to stand up to someone since I am usually shy and soft spoken and my Social anxiety and stutter make it worse. But I was proud of myself.