I've made a lot of mistakes at work lately because I can't concentrate because of the pain. How did it make you FEEL? I feel awful because I always beat myself up when I make a mistake; plus my boss is starting to get angry with me. I know in order to get better I can't let things get to me and I have to stop beating myself up. But I don't know how and it's a tough habit to break. I just have no self esteem.