u/Impossible-Status982

I started exclusively formula feeding my 5 week old, she has been on the ready to use Similac 360 total care but I think the transition made her constipated where she was straining herself to poop all day every day. Her Dr recommended we try Enfamil gentlease, i introduced it slowly but she is nott liking it, is really slow drinking, never drinks as much, pulls away from the bottle and spits up after every bottle. She’s also developed a rash on her cheeks. She seems to do good with her last formula besides being constipated so not sure if I should go back to that one and wait it out maybe she’ll get better after this EFF transition or try something else?