Breastfeeding will help you lose. I pumped/breastfed both my children whilst working 80 hours a week at the office. You will shed the weight if you eat clean. Please do not do IP while pregnant or breastfeeding. Use the IP approved sheet and select lean animal / poultry / fish protein and definitely eat all the IP approved low-glycemic veggies but the packets contain many derivatives and chemicals. Also - the protocol will have you only eating 500-650 calories in the US and 700-850 in CANADA. Your milk supply will diminish if you do not try for closer to 1000 cals a day. Depends on how tall and how old you are. If you breastfeed exclusively, you will burn 800 cals a day. As you introduce solid foods to your baby, your burn rate decreases. I would wait until your baby is on solids before joining the program 100%. But definitely use the sheet approved animal proteins and veggies. It’s very healthy and loaded with vitamins. But eat more. You and your baby need the energy. Congrats Mama!