Oral sex exposes you to syphilis, gonorrhea and herpes. You can test as follows:
-3 weeks after the encounter for gonorrhea.
-6 weeks after the encounter for syphilis, and if you get it negative, you can repeat it 3 months after the encounter, as there are people that take longer to show a positive result.
-3 months after the encounter you can test for herpes.
The general risk is low though.
All the best.
And next when I woke up I start having sore throat problem . What std is related to sore throat.