Daughter is struggling with confidence. She has been a very succesful pitcher. She is worried about pleasing parents and coaches. Also a lot of high expectations. We have expected her to dominate every game and when she hasn't we have been too hard on her. Any advice? Any books? We have know realize it needs to be fun. She has had a couple games recently were she was cruising along just fine and lost it for an inning or two. She is 13 years old.