Very low for any std but still a possibility. From the oral side bacterial seem to be more likely with the most risk being NGU. I had unprotected oral from a stripper and it resulted in NGU that later moved to my prostate(prostatis).
Unprotected Oral exposure-Gon, hsv, NGU, syphillis, hpv risk unknown but could be possible, I stress that the oral side transmission rates are very very unlikely especially viral and worst case easily treated for bacterial
Protected vaginal, Viral would be the only real risk while still very very unlikely, hpv, hsv, hepb, and hiv.
Overall you had a safe exposure, and any std from the exposure you had is not likely, I'd get tested at appropriate times to ensure a healthy future and to protect any future partners