I am a cardiologist and will take up your query. Yes there is no need to worry, nonetheless I am concerned with your question and take this as you want to prevent heart disease from occurring.
Personally, I do not think you have any heart disease. Ignore these symptoms and move on with your life. Follow a healthy life style. Maintain a normal weight. If you insist on other investigations for reassurance, you may consult your doctor and discuss about risk factors for coronary heart disease
. The doctor may order a lipid profile
(if any component is abnormal, your doctor will prescribe a medicine). Your doctor may deem it fit to order two other tests if you are above 30 a Treadmill Test which is likely to be normal but positive you can draw from it would be an exercise schedule tailor made for you exclusively. If you are below 30 and there is slightest suspicion of congenital or valvular heart disease
an echocardiograph with Doppler examination will exclude that possibility. Going beyond these three test is not at all required with the information you have provided.
Dr Anil Grover