Actually, with many good diets, they ALLOW for a day a week for eating anything you want and some good diets even allow free weekends. When we deprive ourself of food, the body is smart and our metabolism will slow thinking we are starving it. So, when we allow some goodies in between dieting days, the metabolism won't slow down. It sort of tricks the body to eat stuff and a lot of the "comfort foods" we enjoy are comfort for a reason - they release good endorphins when we eat them and the body likes that.

Dr Oz said you should binge once a day too. He also said that to try and counteract that binge, do squats for 1-2 minutes after you eat to engage muscle receptors so you burn as many calories as possible.

As with a lot of addictions you are trying to fill a void in your life with the eating. When you throw it back up its kind of like a way of rejecting those feelings. The reason that it happens once a week is because your body has become used to it and so had your mind.

You can break the cycle if you really try. I know it is very hard, but you can trick your mind into thinking differently. For example I can tell from your picture that you are in good shape. Perhaps you could try telling yourself that you don't need to eat all of this food and then purge because that will mess up what you have going for you. I wish you the best of luck and hope that you can overcome this and move on. You don't deserve to have this happen to you and you have the power to fix it.

Good luck and Please Love Yourself