3 month old is still spitting up a lot with enfamil a.r. should i change his formula again?

Try thickening of..: Formula by adding rice cereal, one tablespoon per oz of formula, on every feeding. In case he develops recurrent wheezing, poor weight gain, anemia, or arching of his back with excessive crying, have him checked by his pediatrician.

Spit up: How much are you feeding your baby? Spit up can also be from overfeeding. You should take your baby to see his primary care provider. Maybe he needs to be on some medication for reflux, or maybe it's a case of overfeeding.