My beardie is being treated for a fungal infection with medicine from a vet and silver cream, but today I noticed she has a white spot on her back. Does anyone know what it might be? Basking temp is 91° at 28% humidity, other side of the tank is about . T8 UVB bulb is old but about to be replaced. She seems alert and is excited to eat. I thought it might be a shed but it looks kind of weird to me.