Likely to get chlamydia from unprotected sex for all types (oral, vaginal, anal): https://www.stdaware.com/q/can-i-catch-chlamydia-after-one-sexual-encounter
hi sorry to wade in on someone elses post,but i have post one myself and had no replies.not sure if i did it correctly
Getting chlamydia through oral sex is really rare. Actually there are experts that say chlamydia is not known to be transmitted through oral sex.
There are other stds that can be transmitted more easily through oral sex, but even those ones are difficult to catch.