Yes, he's been at the doctor. Doctor said that everything is allright. That these pain sometimes can be normal and now is because sadness because I needed to move to another country now, for few months, so he is always very sad. And the doctor gave him some Heart vitamins
With the family history, he needs to see a doctor and have some testing. Echocardiogram would be advised. Shortness of breath can be the only sign of a heart attack. Sometimes there is no pain or any other symptoms. My uncle died suddenly at 31 from a massive heart attack due to severe coronary artery disease which he didn't know that he had. He needs to be seen by a doctor now.