I do not always know when I am in afib because I don't get dizzy or shortness of breath; just feel a flutter. To help, I just wear my Polar heart rate watch with the band around my chest that I initially purchased about 7 years ago for working out. I find it to be very accurate. It helps me to know how high or low my pulse is. I was wearing it when I discovered ice cream was a trigger! I feel episodes almost every morning when I wake up and when I lie down at night. This has been confirmed with the watch. My cardiologist is aware and we are discussing medications since I am not on any medications at this time.