I don't work due to AF, either. I stopped working about 4 months ago and plan on not working for the next year. I have about 2 hrs. of energy a day, sometimes rarely I have 5 hrs. of energy, but it comes and goes unpredictably, so I never know when I'll be on and when I'll be feeling off.
It is tough putting my career on hold... I worked as a public school teacher and loved what I did. I'm way too young to stop teaching, but when you're body feels like you're 90 yrs old, there's not much else you can do!