La Dauphine,
Your posts concern me. I posted in another thread that you had commented on regarding BMR (Basal Metabolic Rate) Which is the amount of calories that your body burns at complete rest, just by existing day-to-day. In addition to that, your body does need fuel to operate. You don't want to go drastically the other direction (Like say eating 300-500 calories a day and burning the same amount). This can make you sick, weak, and won't help you in the long run of losing weight. You actually do burn calories while you sleep. That is why people often suggest getting a full 8 hours of good rest a night when dieting. This helps your metabolism tremendously, and your BMR will increase, which means you can burn more calories by doing less.
I don't mean to scold you, I am very happy that you are feeling positive and proud of yourself! Those are good things.
I just see a tendency in you that is concerning. I was bulimic for a good portion of my young teen years and they started with thought processes similar to what you are referring to in your posts. Bulimia led me to health issues, and lots of uncomfortable counseling and doctor visits. Save yourself that kind of grief, and go about weight loss in as healthy a manner as you can!
Side note: Often times when you restrict calories THAT much, you can end up really holding the weight or even gaining. Because your body goes,....wait a minute whats going on? and holds on very tightly to the fat. Think of it like smoking maybe. It is easier to give yourself a little bit here and there which soothes your body and makes letting go of the addiction seemless and easier. If you just quit cold turkey, your body won't have it and will make sure it reminds you how much it hurts.
Have you seen a nutritionist? They might be able to come with a diet plan that is regular and will help you lose weight, but keep you healthy as well.