If its been there long enough to do damage, it wouldn't be going away. In most cases, at some point, you'd start feeling very badly if it was doing damage - pain, fever, aches, diarrhea, vomiting, etc.
Thank you for that clarification Aj. :-) For those reading, the posting was in no way trying to encourage people to not get checked frequently if sexually active, but rather in case it had been already overlooked.
There are no animal models to show that Chlamydial infections are resolved by the host over time. CDC recommendations are to treat if infected. Theorectically symptoms may not be present because of host immune factors. But I doubt that the human will resolve the infection without antibiotics. Only futher research would prove this point. But, I don`t see where that particular argument should be researched ethically. Especially since Chlamydia is so easily treated . Take care.