At times, I've been so absolutely terrified of what I was...

At times, I've been so absolutely terrified of what I was about to do, whether it was public speaking or performance. Whatever it was, sometimes it had me really, really shaking in my shoes, and I decided that I was going to do it no matter what. And, of course, the critic is there, and afterwards, there's this, "Was it good enough? Was it really all I wanted to say?"