Breast-feeding and weight loss

When I was pregnant all the hype about losing weight and breast-feeding! Well this doesn’t seem true for me. I am now six months postpartum and cannot seem to lose any weight. I am breast-feeding, walking and running 2 to 3 miles a day. I eat a low-carb low sugar diet but I am not seeing any movement in the scale or inches. It’s so frustrating. Obviously I want to do what’s best for my child over my weight loss needs. I am just curious if anyone else is having this issue. Thanks