Roxane...again

And another turn for the bad. And this one is a bad one. We took her to the vet last week for a checkup and got a good report card. Quoth the vet: "We're doing the right thing and she's improving". They took a blood test and things were looking better. We're down to twice a week with fluids and once a week with Procrit. Over the weekend she seemed like her old kittenish self. And then Monday and she seemed weak again. And then Tuesday and a new symptom, constant drooling. And today, some blood around her mouth. And back to the vet again with much fear.
She's very dehydrated and she has sores in her mouth. We're uping the fluids, crossing our fingers and saying prayers. If she doesn't rebound in the next day or two then she probably won't and we'll have to put her down.
Needless to say, I'm pretty torn up. It puts a damper on the good news from earlier. She's been a wonderful cat and I hope she pulls through.