Hopefully, antibiotics will be a good prevention for gonorrhea, as you were exposed to a real source of this bacterium.
To see if everything goes ok, keep taking what your doctor prescribed for you (as there are not to many more things we can add to your doctor's advice) and test 3 weeks after the exposure. That is the good window period for gonorrhea.
As you have performed and received oral sex, it would be also interesting to test for syphilis and herpes, as this kind of sexual encounter exposes you to those infections as well. You can test for those infections as follows:
-Syphilis, 6 weeks after the exposure, and if you get it negative, it would be good to repeat it 3 months after the encounter, as there are people that take longer to show a positive result.
-Herpes, 3 months after the encounter.