i m facing less breast milk issue so i have started Nan pro powder milk to my boy. he is 19 days old. i have also give breast milk but it's very less quantity. Doctor said i have to feed him every 2 hours. but he sleeps for 3 hours. I only have to wake him up. He gets up only when he is hungry. But i try to wake up him after 2 hours but he doesn't wake up. so what to do ?