Hello my son 6 weeks ago while during chess presses with a buddy at the gym and he heard a loud pop and ever since then he has been in pain. He has been going back and forth to the gym but his trainer told him last night that he much go to emergency, as it should have healed by now and it has not. He is saying his chest hurts right in the middle between the breasts. My son is stubborn and just brushing it off and saying it will get better. Any ideas what it may be?