My 2 and half month old son is not gaining weight properly. He looks very thin though his weight is 5.5 kg now but still he doesn't look like that. My due date was 30th October but bcoz of some complications(umbilical cord made a loop around his neck).he was born on 5th October through Csection which is 25 days early. He is on formula milk from the start as he doesn't latch properly but i give breast milk also in between. I really want to know that giving formula milk is helping baby or not? I think my milk is not sufficient for him. When i give lactogen he sleeps properly otherwise he gets very disturbed sleep when i keep him only on breastfeeding. Most of the time i sit atleast 1 hr to breast feed him, he sleeps in between l. Kindly guide me m i doing properly? I take iron and calcium tablets and Satavari and leptaden for milk production . Now i am giving him 120 mil formula milt at once and after that he sleeps straight for 3 hrs.