It's likely nothing, but do you really want to take the chance? Go see a doctor. Preferably a cardiologist.
Regular doctors will roll their eyes when you start trying to question them about heart related things and cycling. And their answers will be non-answers just to fill up time till the nurse takes you away. <grin>
Did you just start doing intense cycling or other cardio? Your body does need to get use to it, but you also need to make certain it's not your body telling you no!
Last edited by Iride01; 02-15-22 at 03:40 PM.