Wow well done you.
I was also gutted last week, only lost 2 lbs. Now I know 2 lbs is good but I done a hen night, wedding and stuck to the diet 100% and just thought I deserved more, however this week I lost 5.5lb so that over half stone in 2 weeks.
Just goes to show that you just have to stick with it, it will work in the end.