One thing I've noticed as I've grown older is that this fear of making mistakes is sort of like being afraid of the dark. It's a hollow fear. What's the worst that can happen to me if I make a mistake playing music? Someone might get upset - sounds like their problem to me! If that 'someone' is me, it's my problem, and the only thing I can do about it is try not to make the same mistake again. There are plenty of mistakes. I find new ones.