Well we are home. Not so great news. It was a granular (?) blister most likely from another bad tooth. The vet extracted it but said if the blister doesn't go away or comes back he will have to refer us to a specialist. I guess this is part of what they say about yorkies having notoriously bad teeth. I have been so lucky with Uni so far. Scraps does have the short muzzle (teddy bear look, hate to say that but that's what people would describe him as), and with that comes the dental problems, not enough room for all the teeth, etc.
He seems fine. He did throw up a big clotted blood ball into my hand on the way home. Good thing I wasn't driving, so I was able to get a spare poop bag and put it in there. bf nearly threw up. It was huge, like the size of their mini tennis balls. Poor Lenguo
He was sent home with two pain meds and antibiotic. Hopefully this works. If not, then we have a problem
Thank you everyone for you well wishes.