What Cause Pseudomonas Infection On Nose And Its Treatment?

I have a pseudomonas infection on my nose. I started a course of Levofloxacin and it seemed to help, but the doctor only had me on it for two weeks and now it has recurred. I have also been applying gentomycin topically for several weeks. I had ablation surgery less than 2 weeks ago and am on Amiodarone, 200 mg once a day. Initially I went into a-fib the day after the surgery (before I started the Amiodarone), but I have been in normal sinus rhythm since then. There is a negative interaction between the two drugs Amiodarone and Levofloxacin) that can result in irregular heartbeat. My dermatologist was informed of this by my pharmacist, and she has opted to instead refer me to an infectious disease specialist, but that could take a while. Based on my research it looks like pseudomonas is resistant to most antibiotics. Do you have any interim suggestions for me? Thanks! Martin