the rashes seem to be consistent with the diagnosis your pediatrician
made of your daughter's illness. the rash of hand foot and mouth disease can sometimes last for 3 - 4 weeks depending on the strain of virus that has caused the disease. so if your child is otherwise normal, doing well, fever
has subsided, is accepting feeds normally you could probably wait for few more days before the rashes go away finally. or you can consult your pediatrician if its really bothering you and ask him if there can be some other possibilities.