Bali I did say this before!! DON'T stress out about it. It can be a number of reasons, like TOTM, or water retention, or constipation... A lady in my group lost nothing two weeks in a row, then lost 4lbs after!
I lose about 1lbs per week as it is, I'm very, very impressed with your losses so far! In 6 weeks I've done 10lbs. Everyone is different.
Calm down my dear, diets aren't a miracle cure, you can't expect it all to disappear in a short time. I've been on one form of LL or another for more-than-a-year. It takes time. So patience is key. It DOES work. You WILL lose the weight. Just.... patience.