I overreact myself..for me, it was because of separation from children I parented, that in one second they were taken away from me, and every little thing that happens reminds me of that thing that happened. Was there something in your life that suddenly happened that hurt you? That's great that you've conquered the depression, that's more than hardly any of us can say..how did you do it and can you apply those techniques and strategies toward handling the little things?