I Have Had On Going Uti For Quit Awhile, After

I have had on going uti for quit awhile, after drag they found staghornn kidney stone,after kidney surgery they got it all except small piece,every time they do urine tesbt I am positive after 30 days on macrobid still positve,I am to take for 60 more days.,but my question is I am sch. for hip replacement in aug.cm I still have surgery