+1
After my pregnancies, I lost about 10-15 lbs. in about 6 mos. while breast feeding without even trying. From what I gather, that's really not that unusual. Some women are known to drop more. Unfortunately, some of us

gain some of it back after the baby stops breastfeeding due to not reducing our caloric intake when we no longer need those extra calories.
Anyhow, I recommend to take it slow. Eat sensibly. Try to eat nutritionally dense foods. Keep taking your prenatal vitamins or whatever your doctor is recommending. Don't skimp out on the fat in your diet - just choose healthier options. Your baby needs the fat in breast milk for brain development. And keep in mind that pregnancy is hard on a woman's body. It takes almost a year for our bodies to recover the calcium that is lost from our bones during pregnancy. And, please, let your doctor know so they can monitor you and the baby for any nutritional deficiencies.