My son is 7 weeks. He's had colic pretty much since his second day of life ! He was screaming crying pretty much anytime he was awake. I went through basically the whole Similac line of formulas before finally switching to Enfamil Gentlease and his colic disappeared within the first two days of switching! Highly highly recommend it!!
It says right on our bottle for hiccup gas and colic relief. It's active ingredients are ginger and fennel. It might be worth a try. I only give my LO a half a dose and it does the trick!