It is important to realise that you are not alone. Everyone goes through bumps along the way. If you're taking this challenge really seriously, those bumps can be perceived as mountains.
Hell, my 12 weeks wasn't a smooth ride at all! Whilst I didn't turn to binging, I found that with my relatively extreme approach, the challenge was quite psychologically and physically draining at times. And whilst I loved every moment of it, it was far from easy. That said, I did take quite an approach with regards to training and diet...which is not for everyone. If your regime is too extreme for you to handle, then it quite simply isn't going to work over an extended period of time.
One lesson that I learnt over the 12 weeks was to put these "bumps" into perspective and not be so hard on myself if I did make a mistake. These lessons really helped me to get through the 12 weeks and then to continue these newly formed habits into the future. I realise that it is easier said than done. After a while you just tend to form new lifestyle habits and you realise that these "bumps" in the road are:
1. insignificant with respect to your physique endeavours as a whole. That is, one night isn't going to have a big impact months down the track. It's only when you string night after night after night together that the cumulative effect comes into play.
2. significant with respect to your overall chance of success. Okay now you may think I'm crazy...but these stuff-ups are the times when you learn the most. We all make mistakes - and this can be an excellent thing, so long as you learn from them and move forward - a little more enlightened than before.
What you really need to ask yourself is: "Is my current approach the most effective way to achieve my goals?". Could maybe a more subtle approach get you to your goals quicker? Use your most recent history to predict your future. If it isn't working now, why would it work in 2 weeks time? It may be worthwhile revising your plan of attack.