I would talk to your vet about postponing any further vaccinations at this time.
http://www.thedogplace.org/VACCINES/Rabies-exemption-form-states-2012.asp
Note: The labels on rabies vaccines state that they are for “the vaccination of healthy cats, dogs…” There are medical conditions for which vaccination can jeopardize the life or well-being of an animal.
I would also reevaluate what you are using for flea/tick and heartworm prevention, for obvious reasons. When did the pruritus start?
I would keep her diet simple. No supplements or over the counter meds that have not been recommended by a veterinarian that has examined her.
If it was my dog, I would make an appointment with a dermatologist.
The best choice would be to see a board-certified veterinary dermatologist, if one is available near you (here is a list: http://www.acvd.org/).
Per the search engine here /forums/search/allergies/
