Welcome to the Forum.  I'll provide some information which I hope will be helpful.  Most exposures of the sort you describe do not lead to infection.  the reason for this is two-fold.  First most people do not have oral infection with STIs even among  very high risk persons, fewer than one in ten (10%) of persons have infection.  Further, even if your partner was infected most exposures do not lead to infection.  Precise estimates of the likelihood of infection are lacking but it again, is probably in the range of 10% risk of transmission per exposure or less.  thus putting these two factors together, it is unlikely you were infected.  Thus, oral sex only relatively rarely leads to infection.  When it does, the most common problems are either gonorrhea or non-gonococcal urethritis NGU) caused by mouth organisms introduced in to the urethra during sex.   Gonorrhea is obviously symptomatic within 3-5 days in over 95% of infected men, while with NGU most persons are symptomatic within a week or so but the symptoms end to be less dramatic but are nonetheless easily detected. This sort of non-chlamydial NGU is not clearly and STI in the traditional sense, is not readily transmitted to sex partners like other STIs, and in not associated with complications.  In the United Kingdom, many specialists do not treat NGU associated with oral sex.

I hope these comments are helpful.  If you choose to test, a urine test for gonorrhea (chlamydia testing is typically done automatically with gonorrhea tests but your risk for chlamydia is vanishingly low).  can easily be performed and is quite accurate.  EWH