I hope the paed can give some answers, sounds very stressful for you. My kids can get constipated as are Cows milk protein intolerant (CMPI) - so different to lactose intolerance but much more common than lactose intolerance in babies. They also had severe reflux and quite often the 2 problems go together. My daughters was silent reflux and my son was a vomiter though my daughters pain and reflux was far worse. Your daughter may need a dairy free formula where the proteins are broken down. In a lactose free formula its just the lactose thats been broken down. Over the counter you can but karicare Allerpro which is for mild to moderate CMPI and then there is pepti-junior and then neocate and elecare but they are prescription formulas. My son was on both neocate and allerpro.