After all, you are you're own worst critic.
I recently auditioned for my schools production for Beauty and the Beast JR. And my mouth got really dry, and I couldn't sing very well.
So, of course, after my audition, all I could think about, was how I could have done better.
Here are some ways YOU can deal with post Audition stress.
And DON"T WORRY ABOUT IT!!
The worst thing that could happen is that you don't get the part!