Sorry your girl is sick.
I hope the med's work and she is back to her old healthy self in no time.
My female rottie also has immune issues but they are different then your rotties. She had Immune-mediated Decreased Platelets (Thrombocytopenia) and was very sick. It's been 11 months now and she is doing well. Only thing left over from her sickness is IBS and she can never have any immunizations again. No rabies...no nothing.