[WV~Yorkies]

Originally Posted by gemy

Good - for seeing the vet. Licking and temperament changes normal. Scooting on the bottom may have contributed to the skin tear.

I'd try washing her little butt with lukewarm water, you can even lightly salt the water. Like a tsp in a quart of water.

My advice is do NOT walk her out in public. If you have a backyard, you go out with her while she does her business. Never leave her alone outside.
Is she crate trained? it might help to keep her in the crate with soft bedding which you change regularly. This might be softer than rugs, or hardwood floor.
When you take her to the vet on Monday make sure she is in her travel crate.