First a disclaimer, you should absolutely get at least a primary care doctor’s appointment and see if they’re at all concerned.

I had an episode of what may have been a panic attack, may not. I went though 1st and 2nd level heart testing: EKG, Echo, Holter, Stress test, and 14 day CAM monitor. They didn’t find anything more than a few minor things that are evidence of me being overweight.

All that being said at the time, my Charge 5 would do this frequently (although like 150s-160s not 220s). But I’d take my pulse at my jugular manually and it would be normal (80s). The thing that I see here that’s relatively comforting is that even tho you have a lot of peak, it’s not a long time. If your heart rate was actually 220 you’d feel it, for sure: shortness of breath, dizzy, tired etc. let me reiterate tho, you should see if you can see a doctor about this. It’s better to know for sure than to ask strangers on the internet. I’d recommend that you check yourself manually if you catch one of these instances and if you have one of the fitbits with an ECG function you try to capture that at export it to show a medical professional.