my baby girl is 3month old and she has passed dark yellow foamy, grainy and watery stools for the last 2 days (4-5 times a day and is completely formula fed). her milk intake is also not increasing. birth weight was 2.5 kg and last weight check was 4.5 kg ( in 2 months and 20 days). is this weight normal? what should be the milk intake for a 3 month old ? what should I do about these watery stools?