I read chlamydia can be dormant. if i had regular negative testing up until recent and suddenly positive, must be recent exposure from another person?

New exposure: The chlamydia and some other STD's can lay dormant, but the term reflects more a tendency not to produce symptoms that would lead to discovery and treatment. False negatives can occur with testing, depending on the test and collection method. However, if regular surveillance was negative and you turned up positive, it is most likely from a new exposure.