I had sex with a girl who had chlamydia. i was being treated for chlamydia at the time so i was still taking my meds. does this mean im reinfected?

Possibly: This is one of those problems where a visit to your doctor is necessary to figure out what's going on. Only after a thorough evaluation, including examination and possibly labs and other tests, can your doctor correctly diagnose you and treat you effectively.

Maybe: If you were treated with the common one dose azithromycin, that med stays in your system at germ killing levels for a week or more & might protect you if exposed during that interval. However, many men can have no related symptoms and the only way to know for sure would be to go back in & be checked.

Possibly: If you were in the beginning of the course of medication, you probably were treated. All patients being treated for chlamydia should undergo repeat testing (a test of cure) approximately 30 days after finishing antibiotics to ensure that the infection was irradicated. You should have your doctor retest you in a month if he/she hasn't already planned to do so.