Sorry to hear that you haven't seen any improvement at all. Is she losing weight? I'm glad you got her a vet appt tomorrow to get her checked out. Hopefully she'll have a fresh poop for you to take. Massaging her right side from armpit to vent area will hopefully give you a poo sample. Also, putting a drop or 2 of vegetable on her nose for her to lick off may help with a sample too.
I noticed that you're using a Repti-Sun 10.0, is it a strip fluorescent or coil/compact bulb? If it is a coil or compact bulb, those are very dangerous and can cause all sorts of health problems. If it's the strip fluorescent, then that's good as well as a distance of 6 to 8 inches. But, if it's over 6 months old, then it should be changed as the fluorescents need changing every 5 to 6 months because that's when the output declines. There is a chance that she is semi-brumating even though she is under a yr old but if she has lost any weight, then something else must be going on so if brumation is ruled out by the vet, it would probably be a good idea to remove the hide and encourage her to bask.
The basking temp is fine but the cool side is a little too cool at 23 celcius (73.4 degrees). It should be closer to 27 celcius (about 80 degrees) so you could put a low wattage household bulb on the cool side, like a 25 watt and see if that helps bring the temp up a little. Would probably be a good idea to increase the baths to 3 to 4 times a wk and even offer drinks by mouth to see if she will lick it off. How is her color, any darkness to the beard or tip of tail? Is she alert or lethargic?
You can mix a couple of drops of calcium in with the vegetable babyfood as well as a little bit of chicken babyfood and hopefully she will lick it off her nose to prevent having to forcefeed.
Please keep us updated on her & let us know how the vet visit goes.