Hmm or just go to a doctor and ask for a long term EKG maybe. That's what I did. I had to wear some measuring equipment for a day and then I had the result (broken heart). I don't think this changes from day to day so you might want to get a check every few year.
No, atrial fibrillation occurs in distinct episodes (imagine your heart occasionally having an epileptic seizure that lasts a few hours) and it can be difficult to get an EKG when you suspect something is wrong.
