You can do this, Purps
It won't be easy, but consider it an opportunity to focus on overcoming that anxiety. Otherwise you'll be scared all your life and that is no way to live, now is it
Knowing you, you'll probably be a hit at that place, and charm every person there with your zany yet down-to-earth awesome remarks..which we will unfortunately have to do without. But considering the fact that this is about your health, I don't think anyone isn't willing to make that sacrifice.
...besides, it sounds like people are more than willing to come to you for that zany charm