I m 6 months pregnant and I m having recurrent symptomatic UTI positive to Citrobacter Koseri, I was treated with amoxicillin, but the symptoms returned after one week. It is sensitive to amikacin, ciprofloxacine, nitrofurantoin, trimetropin/sulf.., ampicillin/sulbactam, ceftazidime. What should I do? Thank you E N