Congratulations - you have done very well.

I would second everything that Natruska has said. When you do not eat enough your body starts conserving energy, you burn less and weight loss slows down.

Have you been keeping a journal? Check if there is anything you have eaten recently that could have caused this slowdown.

Take your measurements. Inches are as important as weight. Most importantly stay with it. Check out the Tips on Stalls and Plateaus. http://www.lowcarb.ca/tips/tips008.html

Take care.