SherryWelcome to HealingWell. This is a great site. I look forward to getting to know you better. I can address your A-Fib. Extreme fatigue, emotional stress, severe infections, severe pain can trigger A-Fib. Low or high blood and tissue concentrations of minerals such as potassium, magnesium and calcium can trigger A-Fib. I would suspect your illness was the cause of the A-Fib and if your physician is not concerned with it, then I would relax a bit about that.Now your other questions I will let the others answer. They have awesome info re diets and complications of Crohn's.
Again a warm welcome to youKitt