As a fellow (sober) performer, are you sure you weren't overthinking your sober performance instead of enjoying it, and wowing your crowd?? Also, what exactly was bad? How you felt on stage, or your actual performance? Give it time, you'll get your spark back! and atleast it won't be the type of spark that leads to a coffin...
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GOOD FOR YOU FOR MAKING IT THRU YOUR GIG SOBER!