First of all congratulations on your motherhood. I understand your concern in terms of your health. If you are lactating mother now, then it is recommended that you should take nutritious small n frequent meals. Milk, nuts, fruits and vegetables.if non veg then eggs, fish or lean meat daily. Have Home-cooked foods. Avoid too much spicy n oily food. Drink lots of water.
Next Steps
Keep doing light exercises by not overstressing yourself. You increase the intensity over a period of time after 3 months onwards your surgery.
Health Tips
Once your baby starts weaning n you are little off from lactation, then you start concentrating on weight loss diet more. Since you already feeding, that will also help you lose your weight. You can connect with me personally for a customized diet plan, as i am also from Delhi. Happy parenting. Take care!