Well, i'm 16 and sexually active (but only for a few weeks). I've been with my partner for almost 2 years. Since early last year, i've been suffering from very painful UTI's and i keep getting them. Normally i get prescribed a 5 day course of trimithroperin and i'm fine. But i've had a UTI now for 3 weeks, and i've tried a 5 and 7 day course of trimithroperin and i still have my infection. I'm almost done my 5 day course of ciproflaxin,i'm drinking plenty of water and cranberry juice and peeing reguarly but nothing has changed. I'm worried that i'm immune to the antibiotics or that i have something worse than a UTI, but everytime i go to the doctors they just take a sample, and give me a longer course of antibiotics. (Oh btw, they tested me for STD's to rule out them being the cause - my results were fine) I just want to start feeling better, is there anyway i can at least reduce the pain and constant urge to pee?