Sometimes if you eat too little and exercise too much your body goes into starvation mode and it becomes very hard to lose weight. You may also find that your breastfeeding metabolism makes it harder to shift as well - friend of mine would gain weight while BF, no matter what she did.

I have to agree with the calorie king website - not only will it count calories but it will also let you know how much protein/fat/carbohydrate you are consuming so you can make sure you're getting a balanced diet.

Try not to be too hard on yourself.

BW