Suggest Diet Plan For Infant With G6pd Condition

Ok I have a 1 month infant and he his g6pd and the infamil with iron is not working ever time I feed him he spitting back up I was given him 3 ounces every three hour so I took him 2 his doctor and she told me 2 break it down 2 ounces ever three hour I did that and he still spitting it up its like the milk not dealing with his stomach and it hurts him so what other kind of milk will help