In May of 2011, I pulled my chest muscle very bad. I gave it some time off to heal, getting back to working out I haven’t been able to get a pump in the Right Pec at all. The left pec will do the work and get the pump, but my right pec isnt responding. I get a sharp pain that will last the rest of the day if I push through the pain to complete my chest workout. I’ve given months up for rest. What could this be?