A CT scan of the the heart vessel's inner layers may be helpful to determine if there are any beginnings of CAD and CT angiogram for any partial blockage of the vessels.. If there is plaque build up in the carotid arteries that is a good indication there may be beginnings of CAD with advancement of soft plague and/or plaque buildup in the coronary arteries.
Your medication should control high blood pressure, lower cholesterol, proper diet and exercise, etc. would be the correct protocol, and it seems you are on that regimen. If you don't have chest pains, shortness of breath it may not be nessecary to do any further testing as the doctor may assume you have CAD and further testing for additional evidence would add no useful information.
Thanks for sharing, and if you have any further questions or comments you are welcome to respond. Take care,
Ken