Is my shih tzu sick?

My family and I thinks she is, or it just might be some kind of reaction… Here is what is happening:

Her ear keeps moving as if she is being tickled there.
She's shivering/shaking
She keeps scratching.. ( she has flea protection on! )
She refuses to move
When she walks she'll immediately sit down ( sometimes sitting down to scratch)

Note: It started after she got groomed and a haircut.
There are petechia spots on some areas. ( little red bump spots)

we do think she is sick, today we are probably going to call her doctor if she still feels the same.

Does anyone probably knows whats wrong with her? I mean she eats a bit, and we have to bring the bowl of water to her because she doesn't get up to get water.
My mom thinks another dog did something, but she can't be pregnant I think.. well.. she got neutered.

maybe she hates the new cut.
take her to the vet!