not losing weight EBF

MitoRachel

I am 7 weeks PP and have only lost 1 1/2 lbs. in the last 6 weeks of the 15 I need to lose. I am a little bit confused about why the weight isn't really coming off. I don't eat processed food (I have a very bad reaction to most artificial ingredients), I try to eat a good balance of carbs, fat, and protein and I am not naturally an emotional eater. I started tracking my calories and I am a wee bit low on how many calories I should be consuming if I want to lose 1 lb. a week (the tracker thinks I should be losing 1 1/2 lbs a week). I am also exercising, although I struggle with fatigue and so miss some days. Anyone have any advice and/or encouragement for me?