Hello. Very Good evening. I'm Dr.Yogesh Kr Sharma.  The given history is incomplete. If somebody is breathless along with chest Pain, kindly go for an E.C.G and 2D Echocardiography and better seek an opinion of a cardiologist. A stress Echocardiography of the heart will give you a lot of information. These Type of symptoms are Very common in people who are smokers and leading a stressfull life. Take care and good luck.