Open your week 1 book and start over. It's a new beginning. Don't let what's been done snowball into something you'll regret a few months or a year from now. Start the program over. And write down what you want to accomplish. Put those goals next to your mirror, or on the fridge so you see them every time you look there.
You can do it. Because you're back here posting, you know you've gone off track and need to get back on it. Write down the things that make you want to do damage and recognize what your motivation was for doing so. It's the habits of a lifetime you're trying to change. The only way you can is by recognizing and dealing with them.
Plan, plan, and plan some more! Plan your meals, get the healthy fruits and vegetables around you for when you need them and keep on going.
See how easy it will be?

It will be if you do the program!