Anxious at work

Hi everyone! So last week I started going to the hospital to practice therapy respiratory I've been there only 3 days, and today its my fourth day but I get anxiety and so scared to do sometging wrong. I couldn't do the process today because my "boss" was in front of me, watching me and I felt so anxious, I had a panic attack and I wanted to cry so bad because she was really mean, she told me to stop doing the practice and to calm down.. I think that was the worst experience in my entire life. I really like what I do, I'm a student but I don't think its for me, everytime I think about going back there I feel such a discomfort :( Hours after that I tried doing the process again and I did it really good. Idk if there's a problem with me for being like this its not something I can control to stop being anxious or scared. What I feel more ashamed of is that now everyone thinks I'm a fool for having a panic attack. Just wanted to know if you ever had deal with anything like this before I feel so sad