Sports help!!!! is my son in shock?

a few months ago my 15 year old son experienced a very painful injury in hockey... after 6 months in recovery and two surgeries on his shoulder he is allowed to play again but as his team was getting on the ice he had a minor mental breakdown and couldnt get on. He was scared something bad woulkd happen again. what should i do??? i tried to get him to go to some free skates but he idnt want to go to those either! please hlp!!!