Clamydia again?

Basically I'm sufferiny with bad uti symptoms today. I've just started some anti biotics however when I was at the doctors the doctors asked whether I could have clamydia which I said no as I got tested a few weeks after I first slept with my partner. I've been with the same partner for a year, however before him I had caught Clamydia and was treated (antibiotics) I've heard some stories about it coming back? Could this maybe be the case? I have all uti symptoms and smell fishy?