Hi, My baby is 3.5months old, her birth weight was 2.6kg and now her weight is 4.6kg is this good weight gain I'm only feeding BM. in 1st month she has increased 1kg and 2nd month 600g and in 3rd month only 400g has been increased pls suggest how to increase weight of the baby. and she sweats too much while BF is that normal, is that the reason for not gaining weight.