At that point, you should have stopped and apologized to your son. Tell him that he is not the reason why you got upset and give him a hug. In front of your H of course. That'll show him that he can't rattle you.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.