I tested two months ago for HIV and other STDs. All were negative except rectal chlamydia, which was positive. The only person with whom I had anal sex (a rentboy) agreed to bareback, although he only acts as a top and will not permit himself to be barebacked. He did not *** inside of me, although there could have been precum. He had difficulty staying hard. I have itching of the rectal and penis areas, so I don't question the test. However, could I have gotten a false negative on oral chlamydia and spread the disease from my penis to anus? One other person tried barebacking me, but didn't penetrate, since I normally don't have this kind of sex. I tested negative after that encounter (3 mos). How worried should I be? Thank you for listening.