My two year old daughte has had bad diaper area rashes since was born. Recently she has had small white puss filles bumps around her diaper area. I took her to the emergency room and the er doctor said it was a rash that was now infected. She gave her an oral antibiotic and it went away. Now the bumps came back this time smaller and in clusters and now the white puss has a black dot in the center...what do you think this is? Should I take her in?