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You have not said of any characteristics of the pain – pain from the heart is oppressing, in central chest (and left), worse on effort, may radiate to shoulders and arms, associated with sweating and so on.
Your pain is not typical - still, it is better to investigate... EKG / HOLTER (24 to 48 hour ambulatory monitoring) / ECHOcardiogram
/ TMT (Treadmill exercise ECG) / LABORATORY work-up – will all be necessary for further assessment and assistance.
Wishing speedy recovery