Too much of a reward!

Ok, so last week was a total failure for weightloss. Because of my huge success the prior week, I decided to reward myself with an entire box of cookies from Costco. That's a mistake I won't make again! The scale said I GAINED 5 lbs back! I will definitely be picking smaller rewards from now on. That said, as of today, I have lost those 5 lbs and am back to 258.4 lbs.