My son is 17 days old now, and started developing a rather bad diaper rash around day 5 or so. (He poops and pees after every feeding). I bought some Pentaten ointment, but it seems to be getting worse. Today there's white bumps on top of the red rash and he really fusses when I'm changing him. I've been using Huggies diaper wipes with Vit E. Could this be making it worse? Has anyone else had this same problem? Any advice?