 [ Symptoms ] how long can you be infected with chlamydia is it possible that my boyfriend had chlamydia for a awhile and i did not get infected right away he cheated on me in january and i had my yearly exam at the end of march is it possible i did not get infected right away or that it did not show up when i had my yearly exam [ Disease ] hi sorry to say but chlamydia can stay hidden in men for years before it re emerges so your bf could have had it in his system for sometime do hope this helps you good luck ps you can google can chlamydia stay hidden or with in men