How long will you have to have chlamydia to develop pelvic inflammatory disease?

Chlamydia and PID. The longer you have chlamydia without treatment, the more likely you can have pid. Chlamydia acts by migrating from the cervix to the fallopian tubes so it takes some time. If you use birth control pills, it may take a bit longer. Still, you can't know truly whether there is any effect until you have some testing to confirm the tubes are open after being treated.