Yep, I have one too. Figure if it blows, I'll bleed out in a matter of minutes. So, "at my age" all that's being recommended in a once a year or so check with an ultrasound. So far, no pregnancy detected...
That's okay by me, having had major abdominal surgery before...which seems to be the "fix" if it gets larger. How much larger, I haven't a clue.
So...wait for your Cardio guy's opinion...