I'm A Very Physically Fit 70 Year Old Tennis Teacher

I'm a very physically fit 70 year old tennis teacher who still plays singles at an advanced level. Recently, after a very demanding 2 hour match, I felt bloated, a little dizzy with a rapid and irregular heartbeat. I slept for 2 hours right after the match but could not get rid of the gas and bloating. BP was normal. Heart rate returned to normal I take BP meds. Should I be worried about cardio vascular disease?