Not as bad as you might think. I ate a whole pizza within two weeks of starting WS and I freaked out thinking I had just screwed up the 12 pounds I had lost. The next day, I had only gained .7 pounds and within two days, had lost it plus some. It might slow you down, but it will not mess you up too horribly. Lesson learned. And admit you are human, we all do those things some time or another.
Thomas Edison said it best:
Negative results are just what I want. They’re just as valuable to me as positive results. I can never find the thing that does the job best until I find the ones that don’t.”
and then there is this one as well from Napoleon Hill:
Everyone faces defeat. It may be a stepping-stone or a stumbling block, depending on the mental attitude with which it is faced.