Stopping Self Sabotaging Behaviour

I have been good with my diet for quite some time now and am well on my way to reaching my goal weight.  Until recently.  

I signed up for a unique fundraising activity where I will have to stand outside in line at my favorite store in a bikini.  I get people to sponsor me money that will go to Special Olympics, and the store will dress the participants in a new head-to-toe outfit.  I thought this would be the perfect motivation opportunity.  I will have to stand in public in a bikini, and I will get a new outfit to show off my slimmer new size.  

The day after I signed up I ended up devouring half a bag of chocolate chips left over from some baking.  My self control and motivation to exercise have diminished&nb sp;significantly and I have been making more and more poor decisions when it comes to my diet.  I still want to take part in this event and I still want to keep up with my new healthy lifestyle but I am self sabotaging myself with these behaviors.  I know that I am self sabotaging, but that doesn't seem to help in getting myself back on track!  

Please help me to stop these behaviors and get me back on track!     

I totally know how you feel. I'm trying to do better about my eating so that it doesn't control me. But my sister just came home from college and can get away with eating whatever and not gain much. Not so with me. And it's very hard when she puts those kinds of foods in front of my face, but when you mess up (and we all mess up) just realize, you don't have to start all over, just start again! The natural swing of what you had will come back, after all, it was there before :)