my baby is 4 month old.she is a formula fed baby.i changed her formula milk from similac classic to similac plus.but still she spitting out milk and fussiness.is it safe for her to change milk .and what to do she feels comfortable after taking her milk

A. Spitting of milk and vomiting is normal in this age due to stomach reflux second I would advise you to check the gums of your child because if your child is already fussy and there can be a high possibility that your child has started to have teeth which is why this is the behaviour