Yes I think it is definitely possible to go from starving oneself to overeating. I think it is great you are seeing a dietitian. I wonder if you have considered seeing a psychologist for therapy? They can help you to figure out the thinking and behaviors behind your disordered eating. I've suffered silently off and on with anorexia for over 15 years until recently when I started therapy and finally talked about it because it is presently at its worst. I honestly don't know what I would do right now without my T.