Bottle feeding mamas ! Advice please

Ariana • I'm 20 and we're currently pregnant with baby number one. EDD October 28 2015. 😊👶✨👶🎃
Ok so I was just wondering how your doing with formula. My daughter has been through different enfamils since about a month or two after birth due to her starting to vomit and two made her poop really hard. She's mainly been on gentlesse. Well she turned 4 months today so her doctor was saying she would start drinking enfamil stage 1 around this time so I got it Monday. She's not doing good with it so I went online today & was shocked by the reviews. So I'm just wondering what formula are you all giving your little ones and what has worked for you so far. 
Thank you