Firstly I would like to greet everyone, as this is my first post.
Secondly I would like to congratulate you Kim on your accomplishment, loosing 8 pounds is something to be proud of. We all suffer setbacks, we all fall off that proverbial wagon from time to time. However our mistakes are only grievous if we do not learn from them, it's important that you do not allow this minor obstacle to demean the progress you have already made.
The best advice I can give you is to simply pick up the pieces and carry on with renewed vigor, and the additional wisdom garnered from the experience.

Best of wishes,
Jeremy.