Nutramigen was a lifesaver for my son! Helped so much with his discomfort! We tried other hypoallergenic ones but honestly most of the other ones have an after smell to them. My son would burp or spit up and the smell was nauseating!
If you do switch slowly mix it until you get to 100-% the new formula. A quick change can also cause stomach upset
I don’t use formula but I noticed my baby spit up a lot less doing pace bottle feeding with advent bottles. Use the slowest nipple flow too
MAM anti colic bottles helped my little one. Super easy to sterilise too with boiling water or in the microwave
I recommend Nutramigen or Allimentum! Those are hypoallergenic formulas and my son is almost 8 months old and has been on it since 1 monthish and it has helped with his reflux so much