its normal na may spit up ang baby after burping. hindi pa fully develop ang muscle between the tummy and esophagus.
avoid overfeeding.
upright si baby after milk feeding for atleast 30 minutes.
burp baby after feeding.
As per my babys pedia, its either Milk Allergy, or youre giving too much milk to your baby, try mo hatiin ng small amounts yung pagbibigay ng milk, burp then bigay ulit, try mo din pacifier