It takes more than 2 days to develop urethra symptoms so the burning most likly is an injury from the act itself. And since it was genital you would not get oral symptoms.
Have you seen a doctor? You could have gotten NGU, which is an infection in the urethra, though like Life360 said, 2 days is really early for symptoms to appear. Had you had any prior exposures?
NGU can be caused by lots of things, including normal mouth bacteria or things like adenovirus, which causes bronchitis and other upper respiratory infections. If that bacteria gets into the urethra, it can cause an infection.
Since your symptoms have lingered this long, it's time to see a doctor. Ask them to test you for NGU and gonorrhea, and check your upper respiratory symptoms. You've waited long enough.