Starting a diet too soon after giving birth, can delay your recovery and make you feel a lot more tired than normal. And you need all the energy you can to adjust your life with your new bundle of joy.
As a matter of fact, including some fat in each meal will keep you from overeating and help you stay full. You should also be drinking about 8 or 9 cups of fluids every day, but watch what you drink. Cut back on juice, coffee, and soda.