As far as we know, no STDs of the mouth and throat have triggered
RA,
and it is exceedingly rare to acquire any oral STDs by cunnilngus --
and chlamyida probalby never, by far the most common STD trigger. And as I said, a one week trigger interval is too short.
Unknown condom failures are not rare, so I would not ignore your past sexual exposures as potential sources of urethral chlamydia, NGU, or (less likely) gonorrhea that has now triggered RA.