I wouldn't worry about it. Your doctor is probably just doing a thorough examination of your heart to rule out any other serious illnesses. I am in the EXACT same position as you.
My doctor said that my chest pains are most likely caused by my anxiety, but is going to book me in for an ECG and echocardiogram anyway just to rule out anything else. I had both of them done this morning.
Do not worry. Just try and relax. If there is something abnormal then your doctor would have told you