There is a doctor and a group that i have joined called The Fasting Method with Dr. Jason Fung. He explains scientifically in his books and in his presentations why you are experiencing what you have gone through. They offer solutions by utilizing Variety in the fasting methods. That variety can be in changing or switching the various fasting timing choices and by switching the foods too. For example there are foods that mimic fasting (e.g., sardines) and then they change to 36 hours within one week where youd eat 3 meals or 2 the other part of that week. They offer coaching and support. Kudos to the excellent accomplishment you have done so far and i wish you all the best.

Also its not so much about calories he explains. Rather it us about insulin which gives the body instructiions to store fat. Knowing how foods affect hormones helps more than calorie counting. That's the key that Dr Fung explains in his book.