Wow, no wonder you are uneasy. Second opinion is highly recommended by me. Personal experience on value of traveling to Mayo Clinic to get full workup. There are very knowledgeable electrophysiologists at Mayo/ Rochester. I have, as another comment mentioned, the AliveCor monitor to use w iPhone..it records your heart rhythm, and can be emailed to your cardiologist for review. Be sure to set it to a 2 minute readout. Drs. prefer to see longer strips for better evaluation. I was diagnosed w paroxysmal aFib 10 yrs ago. I took Flecainide for a few yrs, then switched to Sotalol and Diltiazem for better results. Disclosure: I also needed pacemaker for slow bpm. I have plenty of energy. I have taken Warfarin for 9 yrs. ( mitral valve repair 27 yrs ago..at Mayo Clinic, of course), so cant take newer DOAC’s. Good luck to you, but please get 2nd opinion somewhere..not all cardiologists are equal or have experience w Arrythmia issues. Getting an ablation requires a doctor who does many of them...experience matters.