My baby is 6months and her weight is 5kg 480grms, Doctor advised that is because my milk is not sufficient, he is been advising me to give formula milk from last 2 months but I did give thinking she will stop my milk if I start formula milk. Now bcoz she has not gained much, I have to give her formula milk.. Also I have started solid foods from past 20days n she has increased only 300 grms in last 40days. Please advise