hello, Arteries can get blocked acutely or in a chronic manner. Acute blockages can occur any time and usually patient will have very severe symptoms chest pain, sweating etc and it s a life threatening. Doesn t look like this in you. And chronic blockages occurs over a period of years depends upon the patient profile and genetics of individual patient. Since you don t have much risk factors it will take long time for chronic blockages like may be a decade or more. You should be evaluated for other causes of chest pain like gastritis and reflux disease, pleuritis, or musculoskeletal etc.