Just my opinion:
Take an appetite suppressant, like N2Stim, rock your diet and cardio and beat the shit out of the gym.
You can do it, Girl.
Maybe you don't get the concept of breast feeding what ever she eats drinks or takes is going to affect how she produces milk as well as what goes into her milk. You want her baby sucking on some milk with n2stim in it? NOT A GOOD IDEA AT ALL