You need to get confirmation of what the Fitbit is reporting. I have a Fitbit and bouts of Persistant afib. My Fitbit reports have been right on about my afib. If you are in afib you need to get on a blood thinner like Xarelto right away. Being in afib puts you at high risk for blood clots. TIAs are many times caused by small blood clots. They are another reason why you should be concerned about clots. View the TIAs as a warning.

Don't fool around with this. See if you can get in to see an EP cardiologist a.s.a.p.

If afib is confirmed, ask about diltiazem. Diltiazem slows the heart rate generally, and also has an effect on lowering blood pressure.

I also recommend the KardiaMobile as seen above. They are $99.00 for the 2 lead and well worth it.

I wish you the best. Good luck.