Agree with 1st response. If your son has a GI Ped, request some Neocate Infant Formula (Elecare didn't work as well for us). Stop breastfeeding. If you want to continue nursing you will have to do an elimination diet for at least 2 wks before resuming nursing---that means no soy, dairy (watch for casein and whey), wheat, shellfish, eggs, tree nuts, and peanuts. You will have to read every ingredient you put in your mouth. It takes at least 2 wks to get dairy out of your breast milk.