can you try not measuring food?
maybe focusing your obessive/compulsive behavior on something else like if its organic or not and free of pesticides/fungicides/herbicides/antibiotics/growth hormones...im not trying to joke or be sarcastic but to offer an alernative for your pathology...
eat healthy! eat organic! eat local!
You are on the path to anorexia. If you keep this up you will stop menstruating. If you still keep it up your family will put you in the hospital. I don't understand anorexia because the girls subject to it get so thin that they lose all the curves that make them female and they become - ugly. Yes, ugly. Think about it. Are you rejecting your femaleness? Are you rejecting men and sexuality? You say you are not hungry. But you are not hungry for a reason that has nothing to do with food. You are purpoely destroying yourself. You have to find out why.