Thanks for your question on Health Care Magic.
In my opinion, we should first rule out heart related diseases for your
chest pain.
You are having many risk factors for heart diseases like obesity,
diabetes, age more than 55, chest pain on exertion, afibrilation etc.
So likelihood of heart diseases is high in your case.
So get done ecg, 2d echo and
stress test (trade mill test) for the diagnosis of cardiac disease.
Loose weight. Strict control of diabetes is needed.
If all these reports are normal than no need to worry for heart diseases.
You might be having
muscular pain only.
Hope I have solved your query.
I will be happy to help you further.
Wish you good health. Thanks.