Poor girl. Did he put her on any steroids or antiinflammatories? Sometimes a round of steroids will help the swelling go down so the antibiotics can work better. It would definitely make her feel better.

Maybe suggest 5-7 days of prednisolone and see what he says. I've had rats that stroked out and couldn't use their back legs or go to the bathroom. After a few days on the antibiotics and steroids they were back to a functioning rat(not 100% but able to function and be in a multi-level cage).

I hope she pulls through for you. It sounds like she's really trying!