Welcome to Health Care Magic
A normal ECG does not exclude serious heart disease
‘Possible left atrial enlargement ‘ has no relation to your symptoms...
‘Positive D-dimer’ means venous thrombosis
(clot) in veins / it may have serious consequences like Pulmonary Embolism
... You MUST go back to the ER or have a second opinion
– you need more tests...
Wishing speedy recovery