When you said that, Shana, it made me think of Leptospirosis. Has she been vaccinated for that? I hope you're wrong. Have you looked at the whites of her eyes? I don't want to scare you, but you can read this. I know it will scare you anyway, but it will give you something to talk to the vet about.
http://petcaretips.net/leptospirosis.html