Well good news... kinda.
My vet seems pretty sure that it is a slipped disk instead of CM/SM related. There is a spot in the middle of her back that is hot to the touch and very sore. You put pressure there and she yelps.
I'm hoping that is all it is. Sent her home on a Muscle Relaxer and Rimadyl. She already seems to be feeling a little better. Walking around with her head up again and her tail waggin' a little.
If she is not improving then we are gonna have to make the drive to get the MRI done sooner then I was expecting.