Thanks for query,
You might have Anginal pain.
Due to coronary insufficiency our myocardiam have less blood supply so exerting situation like walking on a hill requires more blood but your heart not compensated & you gets pain is an Anginal pain.
That was an infraction (heart attack
) or not should be confirmed by Electrocardiogram & presence of enzymes in blood.
until now you examine your self just avoid any exertional physical activity like running, walking on hills ,lifting weight etc.Thanks