For something like this, first a disclaimer. I write about my experience which is different from yours, and only a doc can advise you on what to do!

So....Yes the doc who said to go home and "forget this happened" was a local cardiologist who is somewhat revered for his caring and also for his unique personality (he is a lobsterman on his day off!). My other more conventional cardiologist, the one who kept pressuring me to go on anticoagulants, told me after 5 years that I had probably been right and that he felt that "they" were maybe overmedicating people. At that point the female factor had been removed from one of the CHADS scores- 4 or 5 years ago?

The difference between you and me is that my afib is hugely symptomatic and I end up in the ER or, that last time, ICU. Do you wear an Apple watch or have a Kardia so you can keep track?

I read a study that suggested short term anticoagulation for infrequent afib that lasted more than 5 hours. It is not in practice yet. The Lovenox was standard for every hospital patient due to lying in bed, and was not treatment for my afib. The echo was reassuring and Mt. Auburn was the only hospital to do that for me, possibly because the episode was 7 hours, the first one to last longer than 3 hours. I believe clots can still form but I had to go with that.

For my first episode I was told to take regular aspirin for a month. For all my other episodes, I was told that aspirin was no longer recommended. Noone has suggested it.

Twice, I wore a monitor for a month and it is pretty clear that I always feel my afib. I had no concerning episodes during those times. So our cases are different.

If I were you I would try to find out what length of time with afib starts to pose severe risk of stroke. I would honestly be nervous with asymptomatic afib for two hours,but it is possible that is not long enough to cause clots. I do not know.

If I need an anticoagulant I might choose Coumadin because it is adjustable. But requires testing all the time. My mother was on it for continuous afib and we kept her safe for years. She went off for 5 days for a procedure and there was a screw up and docs did not provide a "bridge" like Heparin. She had a stroke on day 5. So I know this is serious business. (Then again she had vascular dementia and I wondered how Coumadin might have contributed.)

I hope you can wear something that alerts you- sounds like you do- and keep a journal of times it happens, how long, what you feel etc. Look for patterns. Keep in touch with doc. There may be small things you can do, like not eat after 5, adjust your position, take magnesium and drink low sodium V-8 for potassium, etc. etc. Tai chi and qui gong help me stay calm.

If your new doc wants anticoagulation, you can always see a second opinion. I try to remember that docs have more liability if they don't prescribe. But at the same time if your afib is increasing, they might be right on the meds. Your old doc was going by afib for seconds. I don't have the knowledge to say one way or the other, especially since you don't feel your afib and it seems to be increasing. Keeping a journal will help establish if it is increasing or that was an aberration.

I am sure I have repeated myself here but hope it is marginally helpful. Good luck!