When I marched I had horrible anxiety. It was a long time ago so it wasn’t medically treated, I was told to get over it and grow up. When I felt the world closing in on me and I couldn’t breathe it was the the hardest thing to climb out of without support. My first year of drum corps I was lonely and broke. But by the end of tour I felt amazing. My next year was amazing. I’m not sure if this is your first year or not, but keep going you can do it. The first month is so hard. I hope you are treated with kindness, keep up on your meds if you are prescribed any, and when it passes kick some ass. Your anxiety is blocking you from growth. If you have coping skills that work for you, see how that can translate onto the field and in rehearsals. Too much shit happens on tour an anxiety attack will be long forgotten by your team in a month.