Why does my dog keep shaking?

I have a yorkshire terrier and recently she keeps shaking. She had her haircut at the weekend, so I'm guessing she's just cold? I've put a t-shirt on her but she's still shaking slightly.
She's not an anxious dog at all, she's very lively. We're also moving soon so there's boxes and things so may be that has something to do with it?
I'm sure it's just her being cold after having so much hair, but just thought I should check.

Its definitely the hair cut your dog not use to the temperature surrounding her but she just getting use to it, it'll stop