Well done on your loss so far! You've done amazingly well!!
I'm doing the idiot proof diet too and after good losses in the first 2 weeks, I stayed the same for the next 2! I was a bit disheartened at the time, but decided to stick with it, and since then I've lost most weeks.
I'm very surprised and proud of myself, as usually after a week of staying the same, I give up and go on a binge but something stopped me this time!