Thanks for the replies everyone. These results can't come fast enough!

She's just miserable. The vet prescribed some Hydroxyzine as needed and of course we've been using them for the maximum amount. She's still itching a lot though, but they have made her a little bit better. She's getting a bath tonight, and it looks like it's going to be a weekly thing. Good thing I have a booster bath or my back would seriously suffer!!