I started PB about 8 weeks ago, first 3 weeks were fantastic felt great, lost about 12lbs things were good. then my weight loss stalled, I gained a couple pounds, so I re-read portions of the book about weight loss where counting calories is recommended. so I calculated, BMR activity levels and figured out my daily calorie needs and came up with 1429cals to lose approx 2lbs a week, (92gm protein, 75gm carb, 84gm fat) I've been following this for 4 weeks but have not lost a pound! any suggestions?