Hi,
For the symptoms you are presenting, we need to rule out the presence of angina in such a situation since you have told me that your blood tests revealed nothing. I also hope that you must have got an ECG done(which can only rule out presence of any heart disease).
Excessive burping and such symptoms can also be due to gerd(gastro esophageal reflux disease).
First of all you will have to rule out any associated heart disease,since you are in high risk group(diabetic,mildly hypertensive). ...
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