Crying on the Inside

Don't you hate it when something happens and all you can do is think about all the bad things you did that led to its demise? How does one stay positive about that? I know, I know, I can "learn from my mistakes" and try not to repeat them in the future, but in the meantime how do I turn off the noises in my head telling me how stupid I am? Yes, again, as we've discussed, my self-esteem is already in the toilet...so, this isn't really helping. There's a pretty big side of me which looks like this cartoon right now....slumped over and crying in the corner (although on the outside I'm trying to put up a united front...*trying* being the operative word). What is wrong with me? Am I ever going to pull it together? Sometimes it just doesn't feel like I will.