You shouldn't really have started taking antibiotics unless you have seen a doctor.
If your throat is a virus, which is likely if you have no fever or swelling, antibiotics can make it worse as it kills your natural defensive bacteria in your body as well as any foreign bacteria.
Also, if you have got any sort of STD or bacterial infection, the antibiotics you have chosen to take may not be suitable to whatever infection you may have.
That is what doctors are for,
Tonsilitis is an infection in your tonsils and symptoms include red swollen tonsils (found at either side of your throat)
Mono (mononucleosis) is a viral infection, which causes fever, tiredness, sore throat & swollen glands. This takes 4-6 weeks to develop after catching, through kissing etc
Strep throat is a bacterial infection, which mainly causes difficulty swallowing, sore throat, fever etc...
As fot STD's, Im not familar with any that have oral symptoms, and they definitely would not have caused symtoms an hour after sexual contact. These things need to cultivate and grow in your body before they are symptomatic.
If your throat is sore, go to the docs. They will probably say its a virus, come back if its still there in 2 weeks. Bacterial infections cause fever, swelling etc.