Yes, I know what you mean. 2 years ago, I had a massive heart attack. I'm 47 now..I was 45 then. Scared me to pieces. The tests they ran were an echocardiogram and an ekg. As a preventive I have had blood tests done for cholesterol...regular blood test done and a stress test every 4 months.
Definitely go and get an echo. It will determine whether or not you have a blockage like I did. Don't wait man, just do it