Definitely 2nd opinion and ask for a CT Angiogram. That will show any plaque build up in your arteries that may be causing the chest pains. You can pass a stress test easily and still have blockage. That will give you peace of mind. I can’t believe cardiologist wait so long to do that test. It’s better than a stress test and isn’t that expensive. Insurance may or may not cover and it only takes 15 minutes. You may have no plaque build up but it will show you.