i have told you how to help with the vitamin A issue. You might need to see a vet now.
Check the Association of Reptilian and Amphibian Veterinarians (ARAV) website at https://arav.org and use their "Find a Vet" feature (it's one of the buttons at the very top of the page). See how close you can get to your location.
Contact the Kentucky Herpetological Society and ask if they have any veterinary recommendations or if maybe there's a nearby member who can mentor you. Try asking them if they know of anyplace that would carry Vita-Sol (or something like it) in stock, so you can buy it in person. Sometimes there's a different brand name, or there may be a comparable product known locally as something else.
There are many of us on the forum who hate having to use the phone (and one of them used to work for the phone company!)... However, I would encourage you follow up the initial email to the KHS with a phone call, if you get the feeling that may be how they prefer to communicate. Make yourself a list of "talking points," with all of the important information you want to be able to convey (specs and situation), along with all the questions you want to ask, for when you make the call. And if you type it up, you can also copy/paste it into your email.
I re-read this thread, and I wanted to mention about the dryness... Make sure you are soaking your turtle (daily if she's dry), whether you add anything to the water or not. Make sure the water is warm, not hot. Aim for around 90°F, maybe slightly warmer to start with. My boxie isn't usually interested in food until her carapace reads about 90°F. You may have better luck getting her to eat if you feed her in the water while she's soaking.
Yes, I do put the live feeders, pellets, plant matter, etc., into the soaking water. Especially if/when I feel the need to pay closer attention to how much of what gets eaten. It tends to help with a reluctant turtle, as the gentle movement of the water seems to make floating turtle pellets more enticing (like prey). The pellets soften in water, making them easier for tiny turtle mouths to eat.I’m having a similar issue. Do you put the live feeders or plant matter in the water?