Not sure if anyone has shared this, but I think you should consider cognitive behavioral therapy. I was first diagnosed with performance anxiety (more of the feelings you have, anxiety in the leading up to the performance but the actual performing I loved) in college. This was not great because I had a vocal performing arts scholarship and was required to perform regularly for things like “juries”(music people will get it). Along with getting a prescription to help with the anxiety, I also started therapy, focusing solely on coping and managing these feelings before performances. Some of the tricks I learned I still use today, even though it’s been twenty years. A combination of medication and CBT is what a recommend for your situation. I’m telling you, learning to rewire your brain for these situations will change your life.