I too get really anxious when I have to give a presentation or do an interview. Beta blockers like propranolol have been incredible for these moments. I don’t take them every time, and I luckily don’t face these situations very often. I wouldn’t encourage anyone to dedicate their life to a career that they need medication to survive, doesn’t seem like a good trade off to me. But if you find this to be a real negative thing in your life, you have options besides deep breathing and power poses! Talk to your doctor :)