L.A.
I think this sounds normal.
That is an area or the body that because of its location does not get a lot of air.. Then every time she has to go to the potty, it becomes moist again.. It will take some time..
Can she sleep without panties and go through out the day without panties at home? This may help..
I remember it took a while for my tear after giving birth a while to heal.. I bet it will also take her a while.
I am glad she will be going to the doctor so she can let you know how it looks.
Just hang in there.