For most sexually transmitted diseases, symptoms will appear a few days after contact (2 days to several weeks/months later). This obviously depends on which disease it is, as incubation periods can vary (time between contact and onset of symptoms). Here is a link in which you can read the incubation period of the different diseases as well as the associated symptoms.
*I am not associated with any banner but I find the info in this article relevant to your question😊*
Also, during oral sex, the presence of the penis in the mouth and at the entrance to the throat can create irritation. This can persist for a few days after intercourse and can be similar to a cold or flu sore throat. It is safe and can be relieved with lozenges to soothe the throat. 😊
No, I would encourage you to go for a screening if you are ever in doubt! With STDs, it's better to be more cautious than less, especially since some people will never develop symptoms even if they are infected.
Here's a site that allows you to find a testing center near you based on your postal code 😊.
I hope this answers your question!
Véronique Leclerc, pharmacy intern (under the supervision of Alexandre Chagnon, pharmacist)