I would suggest that you have a CT
angiogram, which will look not only at your heart but also at the aorta and lungs for possible causes of the chest pain. It is very unlikely at your age that you have obstructive atherosclerosiws, especially since the chest pain is not exertional, but you may have an anomalous coronary origin which can cause symptoms, and this would also be evaluated by the CT angiogram.