Know that there is so much more to you than your body. It's not just about perfecting the steps you must trust your instincts to tell deep emotional stories through the steps that you are performing.
I have this absurd syndrome where I get these out-of-the-blue, pathetic panic attacks. It'll be in a very easy, simple scene when everything is going swimmingly, and then suddenly, bang, I'm shvitzing and can't remember my lines.