I think you are being greedy to want faster than 1.5-2lb weight loss per week. Seriously, that's probably faster than you put it on. Relax and enjoy the journey. And I agree with keeping your carbs below 60. You might just be bouncing around at the edge of getting over low carb flu. Or it might just be that it will take you more than a few days. It certainly took me more than 5 weeks to fully adjust to low carb.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 187.5lbs, press 75lbs and deadlift 200lbs