Urine infection. Any serious problem?

Dear doctor, I m suffering from urine infection.. Also I have back side abdominal pain ...pls suggest what to do..I don't have fever..I m taking nitrofurantoin tablet since 5 days...now I don't have any urine sensation pain...but sometimes I think that. I m urinating less...I don't have fever.. But I m tensed now...is it a serious problem...I have done urine culture also...report is not so good. is there any serious problem??? SPECIMEN TYPE : URINE CULTURE Organism : PSEUDOMONAS AERUGINOSA Colony Count : >100000 Cfu/mL Comment : KINDLY CORRELATE CLINICALLY. ANTIBIOTIC SUSCEPTIBILITY Organism : PSEUDOMONAS AERUGINOSA ANTIBIOTIC NAME INTERPRETATION  MIC (µgm/mL) AMIKACIN SENSITIVE 4 CEFEPIME SENSITIVE 4 CEFOPERAZONE-SULBACTUM SENSITIVE <=8 CEFTAZIDIME SENSITIVE 2 COLISTIN SENSITIVE <=0.5 GENTAMICIN SENSITIVE <=1 IMIPENEM SENSITIVE 1 MEROPENEM SENSITIVE <=0.25 PIPERACILLIN-TAZOBACTUM SENSITIVE 16 CIPROFLOXACIN RESISTANT >=4 LEVOFLOXACIN RESISTANT >=8 NORFL