I have just found out I have clamydia. My partner and have been in a monogomous relationship for 3 years now. Is it possible that I /or my partner contracted the disease before we began our relationship without being aware of symtoms?

Also, over what period of time does it take for clamydia to become dangerous for a womens reproductive organs?

And, my partner had test done, adn results came back negative. While it is said results can merely show no symtpoms and thus come back negative, is it possible that in a 3 year relationship, he has not been infected?