You could either get another mouse and see if she eats it or lift her hide and see if the mouse is gone.
I'm 99.99% sure if your snake coiled, it ate it. I'd also bet that she wouldn't eat another mouse right away anyway. I'd wait another 5-7 days for the next meal.
You're not going to disturb her all that much to move the hide to check it out. She'll go back in and settle right down to digest her meal.

IMO!