meri baby bht patli hai n she is 2 month old

Hi Harsha! At this age baby would be exclusively on breastfeeding. Have you discussed with your pediatrcian?

If its a baby boy, weight can be anywhere between 4.3 to 57 kgs and if it's a girl the anywhere between 5.4 to 7 kgs. don't worry every child has their own way of grown and will differ from another. unless the child is way too under weight. is that the case ?

No

Don't worry every child growth is diffrent. keep breastfeeding ur baby. she will gain weight. for any other concern u should also speak to ur pedea.