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Pain on effort is highly suggestive of angina
You must see your doctor as soon as possible
EKG /HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) / LABORATORY work-up – may all be necessary for further assessment and assistance.
The treating doctor may suggest them depending on need, based on his assessment of the situation.
You may also need investigation for reflux
Wishing speedy recovery