Katfish, I had been going through something similiar to this doubt you are finding yourself in.
So, after much, much, much encouragement from friends, family, and ESPECIALLY my friends on here, I realize that a few mistakes don't mean anything.
I actually made a big sign to put over my machine that says:
FINISHED IS BETTER THAN PERFECT!
Another thing I've learned, we are our own worst critic. Most people won't even see our "mistakes".