Eric
Have you consider leaky gut until now? There are many anecdotical evidence of immune reactions linked to leaky gut caused by chronic low level infections. And many AF cases are in fact long lasting infections that weaken and mess the body systems.
Might be a possibility. Check the net - for me this makes a lot of sense including chemical sensitivities . Make sure you look for more than just candida.
Autoimmune is almost always a reaction to long lasting infections. You may find many explanations about your case.