OP, as a former "angry" person, myself, I can tell you that you need to get some help. Forget the therapists. There are free, group counseling sessions around. The first thing you need to do is figure out what exactly it is that has you so angry. The pedo is a great start. You need to know, IT'S NOT YOUR FAULT! Talking about it is a great start. If you want to PM me, I am happy to help. Otherwise, I think your continuing to talk here can help. There are some solid peeps here. Ignore the asshats.
I have much to offer in help, but the words are not appropriate at this time. Until then, I offer: Take a deep breath when you want to explode. Think about your response. Practice silence when you get angry and want to beat someone to death. Walk away. YOU stay in control.