Poor Gracie. I researched fungal infections pretty extensively last year when Sherman got sick. The vets were actually hoping he did have a fungal infection, because at least it would be treatable. Sadly, that wasn't the case. But I did read that it's pretty common in the midwest but not on the east coast. They are supposed to be fairly tough to get rid of, be sure you give her all the doses of meds. Keep a close eye if she seems to be developing breathing problems.

(((hugs))) You must be pretty scared for her, we'll send sibe vibes & keep Gracie & you in our prayers.

It sounds like the diagnosis might be blastomycosis, that's what they thought Shermie had. Here is an article.