My Bradycardia started in 05 with a LBBB. In 19 I had an Afib event with an ablation 6 mos later. HR was in high 40s when I was in bed. In 8/20 my EP had me take a stress EKG and Chronotropic Incompetence was the diagnosis. This resulted in Pacemaker implant 3 months ago. My first Followup in person is in 10 days. I would suggest a stress EKG to how your heart responds.