Your probably suffering from low blood sugar.You weigh a small amount and you say you eat till full.Try eat 3 meals with alot of starch like rice potatoes etc.

This COULD be whats happening.Like your stuck in limbo trying to do a carb diet but just not eating enough carbs to feel energized.

There is a drink called Glucozade that is pure glucose that I would sip instead of orange juice with its high fructose content.Its big in Europe though I dont know where your from.