Do you add any water to your raw diet? Is it ground, whole chunks, or a mix of both? Do you add any salt?
I have personally noticed that chunks, while full of moisture, do lose some. I add quite a bit of water to the ground bones/organs in order to get them as much water as possible, and it re-hydrates the chunks a little when I mix it all together. It isn't soupy though, my cat won't eat soup.
If you are using a recipe like the one on catinfo.org, where she recommends you add Morton's Lite Salt for iodine, it could simply be that she is made to feel more thirsty because of the salt. Additionally, check to make sure none of the meat is plumped with a salt brine, as that would definitely make her feel more thirsty.
Since you are only a month away from her yearly check-up/blood draw, I would say toy around with the water amount and wait until then. You can re-evaluate weekly, and decide if you should reschedule based on what you are seeing.