I agree if it's been 6 weeks it's time to count calories as well.

I was struck by this comment by Jenny Ruhl in her book Diet 101 that really struck home - "I've even seen people suggesting that it was the 7 grams of "hidden carbs" in a cup of cream that stalled their diet, rather than the 820 calories that cream contributed. Overly carb-centric thinking leads low carb dieters to come up with some very questionable explanations as to why high calorie foods stall them."

I too am someone who needs to cap both carbs AND calories to lose - and I've seen that with many (maybe most) women over 40...