I had massive anxiety as a child. I was in therapy. From 8 to 10, I was borderline agora-phobic. I could not leave my mom's side. There was a lot of fear, but it was also very exciting.
Improv is what helped me overcome the anxiety that I was feeling sometimes. It's the thing that pushes me to be present, and to keep moving through all of the what-ifs that go through my mind.