I wish I could offer help, but I have been far less aggressive since I started transitioning. The T didn't change my aggression levels at all, which is apparently a pretty common side effect that I am glad I didn't get. Though, whenever I get irritated in general, I go for a jog or write. Try finding something physical or creative to do when you are feeling irritated maybe. Like I said, I can only guess, since I never experienced increased aggression.