Time to switch to frozen since she isn't eating now?

You can definitely try switching her right now, she may or may not take it, just don't starve her so long that she starts losing weight.

As for the yawning, does she keep her mouth open a little bit or close it right away? Sometimes they will open their mouth to breathe when they have an RI.

She does close it right away. I also have been checking her mouth and gums every week or two since our winter move to make sure she didn't have bubbles. It is like a wake up yawn. She seems a little owner than moral too. I figure it is just a winter slow down. First year with a snake but my Beardie and leopard gecko always seem to slow down eating through winter months.