Unfortunately, pain related to the
heart is not easily differentiated from chest pain
or discomfort from respiratory, esophogeal,
or the chest's skeletal configuration.
Even if the pain does not return tha would not indicate there is no heart problem. The cause could be the heart muscle from viral infection, medication, etc. or it could be a spasm of the coronary artery that temporarily shut off circulation of oxygenated blood, etc. Worst case scenario. You should get an evaluation.