I had the same experience. After 2 weeks I had gained 7 pounds and my jeans felt tight, what the....After a good cry and a talk with DH I decided that I promised to continue with this challenge for the full 12 weeks and now was not the time to break a promise, so I continued on. I am now in week five and the weight is coming back down this morning 179, I started at 175. More importantly the inches are starting to come off. I took pics and 4 weeks, but didn't notice any difference in them. The biggest difference is the one you don't see it's how I feel. I feel stronger, less jiggly and all round more energetic. One thing I did do was cut back on the meals, I just couldn't do the 6 meals, so I've cut it down to 3 with a snack, if I feel like it. It's working much better for me with 3 meals instead of 6.