My girlfriend that I have been dating for a while tested positive for it. She has not been with anyone else but me and has tested before negative few years ago. I am not sure what that means but is this even a possibility? I have never had intercourse with the first woman only oral sex. Wouldn't it mean that I would have oral chlamydia and not in the genitals? And if that is possible, how would I pass it to the vagina if I contracted it orally?