Advice

Can somebody give me an advice my daughter is two months and not wanting to eat much she eats only around 18 to 19 oz of milk sometimes even less doctor wants her to eat 24 oz and my daughter just don’t want to eat more her doctor just says to keep on giving her more and more because she’s under weight

But if I give her to much she throws up idk What to do I am worried for her I go get her checked up and all they say is keep on giving her milk every time you can but it’s not going any were she’s not taking more and also is not gaining the weight she suppose to

When she was born she weighted 8lb 1oz and know she’s up to 10lb what can I do to get her to take more milk