I'm sorry Callie is having problems with the move! It's pretty typical for a Yorkie to internalize everything and take it personally. One thing is most likely happening, she is picking up any anxiety that you have and doesn't know how to handle it. I know it will be hard to do but I would stop feeling sorry for her - she is sensing it and not dealing well. With people, we appreciate someone feeling sorry for us when we are unhappy or worried but dogs can't process that whole abstract without sensing the worry of the person and they don't know why that person is sad toward them. They
get sad, too.
I would just be as matter of fact and upbeat as possible and even fake happiness, a lot of smiling at her, clapping your hands softly and speaking very upbeat, telling her what a big, good, strong girl she is. When Tibbe was new & scared by noises, I would use all the upbeat, strong-sounding words I knew to talk to him, the saying of those positive things just sort of charged me, made me feel good just to say them. I called him "my Soldier", "my Hero", "big man", "tough guy", "tougher than nails", etc. It really seemed to pump him & I think it was just him reacting to my natural feelings associated with those words. Can't help but prop one up a bit just to say those things. Tibbe reacted in kind.
Rather than sort of coddle Callie, if you could put on some music with a bit of a beat, get a bouncy air about the room & you, entice her to play some, put her through some training, teach her a new trick and keep her distracted and busy, she will likely start to relax. Busy dogs are usually happy dogs and the nervous tummy from the new, strange situation could start to feel empty as she works & plays with you, finds she needs more energy to keep up with you keeping busy.
If you make a little fun game of the new things as they come along rather than feeling bad for her, she will likely transition better. I'll bet she's just sensing every worry you have, her nerves are going straight to her tummy & upsetting it/unsettling it, and would love some work to do, a little ball to chase or a mind-game to play, to get her having some fun again. Just try it and see if she doesn't like a little change toward the positive. And can you try putting some of her food in a kong toy and tossing it around, seeing if she won't chase it, sniff & take a few bites? Or toss her food a few feet across the floor or hide pieces to see if she will seek it out & eat it? Making a game of it might get her wanting to try some food if she has to chase it, run get it, etc.
I hope tomorrow finds Callie feeling better, eating & Taylor happier!