What Causes Severe Pain In Chest Along With Difficulty In Breathing?

Hi, my boyfriend took 2.5 pill capsules of ecstasy referred to as pink penguins . I thought he was over dosing cause he showed all the symptoms. But when we got to the hospital the doctor said he did not over dose. Although the doctor hardly have him any attention to begin with. He s had really bad chest pains and heavy breathing since his bad trip began and even though he s sobered up the chest pains and heavy breathing have stuck with him. He s described them to me as random sharp pains in his heart and a very tight chest feeling, we told the doctor at the hospital and she said that s normal after taking ecstasy but the pains have stuck with him and it concerns me if there s maybe something she overlooked. I ve noticed he can t even stand for very long without getting light headed and cannot breathe without his chest hurting. I m hoping he didn t do any long term physical damage. The doctor could be right but I just wanna get a second opinion. He s been looking weak. We cannot afford to go to the doctors right now since he does not have insurance. I would really appreciate any help and advice you could give. Thank you!