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Pain related to breathing / worse with time / left upper chest and cardiac region – this could mean Plural or pericardial inflammation
/ pain may be from pleural or pericardial rub..
It is better to see a cardiologist – physical examination, followed by EKG is necessary.
A chest X-ray and an ECHOcardiogram
may also be needed.
It appears to have no relation to your medication
Wishing speedy recovery