We made an emergency vet appt. They told us to do hot compresses and gave us another antibiotic. We ran into our normal vet doctor and he asked us what we were doing. We told him what's going on. He said that it's not that the antibiotics won't work; it's that her immune system is so weak. He said hopefully the new antibiotics help with the new infection, but if we can't figure out why her immune system is so weak, she is going to continually suffer from infections which will shorten her lifespan.

We've been at this for 2 years now. My dog is healthy otherwise and very happy and full of energy. It's just not fair.
I guess I'll try emailing my T again. It's not an emergency though, and I feel bad because I have depended on her way too much lately. I don't want to abuse the freedom she has given me with contacting her.