Keep a really close eye on her. You could buy little dog panties, but she'd still be dragging her butt on the floor. Keep her kenneled when you are gone so she cant scoot and keep the cone on her when she is in her kennel so she doesn't lick.
The panties are usually used for dogs who go into heat and they don't make a big mess on the ground but it might help.
I would also call the vet to see what they recommend.