With you caring for her she's got the best chances of beating this. I've got a good feeling that she'll be fine.
Our dog, Boris, scared us quite a bit earlier this week when he got "sudden onset ataxia" out of nowhere. He couldn't stand and wouldn't eat. The two vets we took him to were perplexed and offered no treatment. Three days later he's getting better but still can't turn or walk to the right, almost like a stroke. His illness turned the household upside down for a couple of days so I completely understand what you are going through.