I have been treated for pseudomonas three times the last three years, each time with a 10 or 14 day course of levafloxicin, and because the stenotrophomonas kicked into high gear after I may or may not have had a mild case of covid, my ID doc decided we could wait no longer (I may be able to end treatment for MAC at the end of May), and prescribed levafloxicin again. Something is active again, now awaiting latest AFB/sputum culture results. So here we are. I am resigned to spending the rest of my life on and off antibiotics. Good luck to you and please don't become disheartened.