How to tell if your baby is allergic to certain diapers??

chelsea
Hey moms!! My daughter is 2wks4days && we've been using "Pampers" brand diapers since we left the hospital. Last week we started noticing that she had little red bumps between her legs on the little "lips" part down there. At her two week check up we mentioned it to her doctor and she gave us a cream to put on there. Now we are noticing a few more is starting to pop up and we were wondering if this could be a allergic reaction to the brand diapers we are using. What would a allergic reaction look like if you are allergic to diapers on a child?