if it makes you feel any better i have a yellow VT male who developed some sort of internal infection that ate a whole through his side and he pulled through. It's all patched up now though there's some scarring. He wasn't eating at that point and didn't for two months, but eventually he pulled around. If your girl can take small foods than feed her, but i would agree with feeding her something smaller. daphnia, perhaps.
it's scary how thin they get when they aren't eating, but the ones with fight are hard to kill. there's still hope for your girl, just make sure you keep the water pristine because bacteria now has an freeway into her. All i did for my guy (because i wasn't sure what was wrong) was keep his water clean and keep him in a dark out of the way place.