So for about a week have been feeling like im having heart attack with all same symptoms as one more sudden then gradual though. i do smoke cigarettes and it makes it worse. i do have panic attacks but nothing like this. what should i do?

See a doctor: without knowing your medical history, medications, a more detailed description of the pain and what else it is associated with, it is best to have a through exam and testing done by a doctor. If sudden, then go to an ER. Good luck

Panic: I'm sure this is frightening. Please see your doc to rule out medical conditions. Please get into a smoking cessation program to lower your odds for future health problems. See clinical psychologist who treats panic disorder. It may take a little time but there are lots of reasons to be hopeful. Peace and good health.