Emery board her nails to keep them rounded and you have to call an allergist in the morning. I feel so bad for dogs like yours. Some people make them wear E-collars. Can you imagine intensely itching and having your hands tied behind your back. Stop the misery and find out what it is. It takes too long for trial and error methods. Pay the money and KNOW....then you can deal with whatever it is she's allergic to.