Thank you all for replying. I really do appreciate the feedback.

-I will look into getting new bedding that better retains moisture. I'll get a picture of her tank up here soon to show how it's set up, as well. When I next go to the store, I'll look into getting a broader water dish.
-Sometimes the mice make her bulge a bit near the middle. She's not very big nor does she readily accept food most weeks; I have to try again the next few days to make sure she eats.
-Her prolapse retracts if her tail is massaged against the way her scales run, but the past few times it's happened during classes so I've been unable to do this until quite a few hours later. However, it takes a while to get the prolapse moist again, and these last few times it's been as long as the length from the middle knuckle to the tip of my thumb.

Is there something I can feed her in addition to mice to help her get more fluids?