I'm so sorry your girl has been diagnosed with this dreaded condition. I've been where your at, this is a journey none of us expect to travel with our pups. Personally, I found a lot of valuable info and moral support from a kidney group. Maybe when your not so overwhelmed you could check it out. The SQ fluids they suggested gave my boy almost two more precious years of life. This is their link....
K9KIDNEYS : for owners of dogs with Kidney Disease
If you google "Dogaware kidney " this also has some info explained in a very simple and helpful form.......I wish you all the best......