Hi, just seen this and wanted to ask....
When you say about the way she was holding her head and neck, was it like it looked like she was getting ready to throw up...kinda stretching out her head.
I ask because my Ralph started doing this a few weeks back. He also wasnt himself, very quiet etc.
Took him to vets who said hes def got some pain in the back area but wasnt sure if it was back or stomach....
Anyway he was totally better a day or 2 later, so Im thinking it was a little bug or smething
Hope all goes well for you