How to play live during mental health crisis?

I’m going on tour with my band next week and I am currently at an all time low with my confidence and am doubting myself in every possible way. This is bleeding into my creative expression and it pains me so much. Right now I have no energy to barely exist and the idea of playing live (something I usually love with all I am) next week gives me so much anxiety. I’m going back to therapy after the tour, I’m just looking for ways to manage until then. Any tips?