I can't tell you what the scales will say but I can tell you to just pick yourself up and do better tomorrow.
What good is giving up gonna do you?
Will it help you lose the weight? Will it help you to become healthy? Of course not! Just say to yourself, well I can't fix yesterday but I can keep it from happening again and move on. That will help you to lose the weight and to become healthy.
I am almost done with my second round and I cheated once during the first, I had a couple of mixed drinks. I was out of town so I didn't weigh, but when I came home 2 days later I was still up 2 pounds. So, I decided it wasn't worth it, I wouldn't let it happen again. I mean come on I knew what a vodka soda tasted like, I could have waited. Just like you know what "insert temptaion here" tastes like too, you can wait too. This isn't forever, it's for however many days you are doing it and then at least another 3 weeks. Eventually you can have a serving of "insert temptaion here" again and hopefully by then you will be have learned how to stop after 1 serving. We aren't going to never taste our favorites again but we aren't for awhile.
Just tell yourself this: I've tasted it before, I will taste it again, but there's no way it tastes as good as being thin feels.
Good luck to you! Don't quit, write down what I said, and read it every time you feel weak.