I don't agree that your child is a typical 2/3 year old. Typical 2/3 year olds don't hurt themselves when they tantrum without noticing. My suggestion is to go to your son's pediatrician and ask for a referral for psychotherapy. You need to work on repairing your relationship with your son. He sounds like he is going to need help managing his emotions. The earlier you get started with helping him the better.