I am very confused. I was diagnosed with AF and on my warning book it says that AF is the reason I'm on it. I saw a different doctor ( not cardiologist) when I was admitted due to upper respiratory infection that it's not AF. Reading symptoms of AF on here mine seems different. When I go into an episode my heart does a mixture of slow and fast and lots of what I call tremors when it's not quite a beat but I can feel it. It is so erratic it's difficult to measure the heart rate.I must mention I have a pacemaker due to total heart block which is set at 60 bpm when my heart rate is erratic I feel unwell shaky and nauseous. Is this af or eptopic? It can go on for several hours. Apparently I don't look at all well when it is happening.