At the age of 26 with a normal blood pressure the likelihood of your chest discomfort being because of a heart problem is very low. Your weight and body habits also makes it less likely. I presume you have no family history of heart disease. It is desirable to check your blood sugar and cholesterol and triglyceride levels especially because of a family h/o diabetes. In addition, an ECG and an echocardiography is also indicated in view of some features of Marfanoid habitus. (Your height of 6 feet and long tapering fingers).
Marfan's syndrome is a connective tissue disorder characterized by several features: Tall lanky person with abnormal arm span, upper segment of body ratio and lower segment again abnormal, long tapering fingers, some abnormalities of palate. Abnormalities in eyes etc. There can be some abnormalities of the structure in heart and blood vessels arising from the heart. Most of them can be diagnosed by a good clinical examination, x-rays and echocardiography.
MBBS doctors can also diagnose these abnormalities provided they have seen these problems before. You can get in touch with your general physician who is treating you and propose these suggestions. He may take help of a specialist in this field.