I'm A Male 56 Years Old, 5'10", 193lbs, Excersise 4-5

I'm a male 56 years old, 5'10", 193lbs, excersise 4-5 days a week, road bike 50-60 miles a weeks, mild chest tightness started this morning. No personal history of heart disease or related issues, no health problems at all this point, not on any prescription medications. Am I getting a warning sign I may have a blocked artery?