I had to go to the emergency room about a week ago with severe abdominal pain. They diagnoised me with PID. A couples days later they called me and told me that my test for chlamydia was positive. I told my boyfriend of three months and he was upset. He automatically assumed I cheated on him. But I haven't been with anyone else since May. He went and got tested for it and it came back nagative. So the doctor told him there is no way we have been having unprotected sex for three to four months and him not get it if I have had it that long. But I haven't been with anyone other than him. So how could he not get it?