Formula help

Sabrina • The Daughter of my Dreams My Rainbow Child, My Everything 🌻PJL 08-10-20🌻

Our newborn was originally on Similac advanced (which is what the hospital provided so we just ordered that when we got out) and she was having a lot of gas and hiccups so I switched her over to Similac sensitive. She’s been on it for a week and now is extremely constipated and is still have really bad gas and hiccups. If anyone has formula recommendations that worked for their newborns I would appreciate it! Thanks!