Hello
In spite of this that this pain , particularly on the left side , in the chest , more due to exertion ( activeness ) and now even at rest is a clear indication of some seriousness , because of age factor ( 53 years ). Yes this pain may be due to "ANGINA PECTORIS" a precursor of
heart disease .
2nd reason of such pain may be due to hyper acidity or
gastritis ( gas formation in layman terms) . Diagnosis can be confirmed by upper G I
endoscopy. Also avoid greasy , oily , spicy foods . Also take some antacid but if pain is severe , you may need drugs like
proton pump inhibitor like pantaloc-D .
The next reason of such pain may be due to
menopause syndrome ( as this is mild degree pain and age is also an indication of menopause) . Diagnosis can be confirmed by hormonal estimation .
Since you are obese patient , 53 years old , so first deal for menopause and then consult a " Cardiologist " and get his opinion.
Hope this will help.