Yes, I do this sabotage dance. That's why I needed OA and not a pay and weigh program like WW.
I agree with Redhead. Having some practice where I pause and remember something bigger than myself goes a long way toward helping me make good decisions.
I've lost about 60 lbs from my high weight. 40 of those lbs, I lost four years ago, and they've stayed off. I found that the first step for me was not to eliminate any foods, but to add foods. When you say that you are light headed from not eating enough, you're telling me that you've starved yourself. That's a mean thing to do. I used to be mean to my body all the time. I was punishing myself for emotions, for being fat, or just generally not being good enough. Then after the starving, of course I would binge. My body needed the food and binging blindly and thoughtlessly was the only way that I could get it. The first step for me was to allow myself to eat frequent, nourishing meals, no matter how much I exercised and no matter what I had binged on the day before.
Today, I eat four nourishing meals a day, no exceptions, and no snacking in between. More recently, I've given up sugary foods and anything that feels like recreation instead of nourishment. My weight is lowering again, into a range that I am truly happy with.
As for getting yourself down 5 lbs in 12 days... I don't know. If that's really what you want out of life, I wish you well with that goal. That wouldn't be enough for me. I don't want to stop with numbers on a scale, I want a full and rewarding life that doesn't revolve around food. I want friends and family, and a bustling career. I want to feel good about my place in the world. I can't have both. I can't have the life that I want and continue to place all of my focus on that dang contraption in the bathroom that tells me if I'm fat or not. And that's really hard for me to say because I'm very attached to the scale. Its so much easier in the morning to look to the scale to tell me if I've lost weight than to really take stock of my life and decide if I'm happy with the choices I'm making day to day. You have to decide what you really want.