Probably your sore throat is not due to any STD, although it may be related to the oral sex event in other ways (more on which below). 24 hours is too soon for onset of symptoms from any known infection, with the possible exception of certain viruses. Oral gonorrhea rarely cause symptoms at all and probably never so quickly (2-3 days minimum); over 90% of oral gonorrhea causes no symptoms at all. Absence of obvious urethral discharge in your partner also is evidence he didn't have it, since asymptomatic urethral gonorrhea is rare. Oral chlamydia is rare and not known to cause sore throat or any other symptoms. Herpes conceivably is a risk if your partner had an active HSV2 infection, but symptoms generally don't start sooner than 3-4 days and usually include blisters, open sores, etc.

Some strains of adenovirus -- primarily a cause of common colds, sore throats, and conjunctivitis (pink eye) -- can infect the urethra and symptoms might start this quickly. Although uncomfortable for a while, adenovirus ultimately is harmless. In addition to the oral sex, did you and your partner kiss? If so, that's a more likely source of your sore throat, which could be due to any garden variety upper respiratory virus in addition to adenovirus. That you are susceptible to throat pain in various settings might suggest a psychological component to your throat pain as well.

Many years ago (1980s), there were reports that sore throat appeared to be common after performing oral sex but not caused by any known STD. At the time there was speculation about minor physical trauma (depending on the vigor of the oral sex event), or about minor inflammation from normal skin/penile bacteria. This question never has been resolved -- but neither have there been any further reports or studies of this phenomenon over the past 40 years.

My advice is to sit tight for a few days. If your throat pain persists or worsens; if blisters, sores or ulcers appear in the throat or mouth; or if you develop other symptoms like fever, see a doctor or clinic for clinical evaluation and possible treatment. Evaluation could include a throat swab for gonorrhea testing. In the meantime, you also could speak with your partner about the possibility of the two of you going together for STD testing. That he take PrEP to prevent HIV suggests he may have frequent unprotected sex with other guys, so it certainly is possible he has oral gonorrhea, for example. Simultaneous testing might be reassuring for both of you.

I would avoid any temptation to take or seek antibiotic treatment at this time. Better to see how things shake out for a few days. Most likely your throat pain will quickly fade away.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD

Should I be tested for oral gonorrhea?

Considering that most people infections clear up in 3 months time and it cannot be passed on with vaginal sex. 

Syphilis- I see you did not mention this but wouldn’t this be the next riskiest sti I could have gotten based off my exporsure. Should I be tested? If so if most infections show symptoms between 21-28 days, is it possible for me to get tested within that time to get an accurate result? Having to wait the full six weeks would be an ordeal, I rather get tested earlier even though there may be a chance of a false negative. Will there be any data on the percentage of a false negative at 2 or 3 weeks time?

HIV- same question with syphilis regarding testing time

Hsv2- If I do not get any symptoms within 10 days of exposure would you say I am most likely in the clear?

To give an update everything does seem consistent with a cold, a pretty bad one, but I have had no sores or ulcers.

Syphilis indeed could be a risk, but very small for any single exposure and it sounds like your partner is unlikely to have it. If you caught syphilis, you would expect an oral sore (chancre) to start 10-20 days after exposure. But if you would also like the reassurance of a negative blood test, it is correct that 6 weeks is necessary for a conclusive result. However, probably 90% of newly infected people have positive test results at around 4 weeks, so you could test then if you wish.

The risk of HIV from a single episode of receptive oral sex with an infected partner has been estimated by CDC to be one chance in 10,000. That's equivalent to giving BJs to infected male partners every day for 27 years before catching HIV might be likely. And from what you know of your partner, the likelihood he has HIV seems to be very low. Here too, it's up to you if you would sleep better knowing you've had a negative test result. 100% conclusive testing can be done at 6 weeks.

Oral infection with HSV2 is very rare. Here too there is little or no risk. However, the blood tests are not highly accurate and we never recommend HSV testing after any single exposure. If you don't have oral blisters or ulcers and severe sore throat within a few days, it will be strong reassurance you weren't infected with HSV2.

I plan to save my reply for when my results come in, I have an appointment next week to be tested. However I am bit concerned about a symptom that I noticed this morning. There seems to be a very small oval black dot just in the inside of my gums close to the corner of my lips. It seems like it’s a small blood clot or what I found on google a melanotic macule. I am very concerned this may be a syphilis chancre. If so what other symptoms should I also experience in primary syphilis besides a chancre?  I want to add that I have been dealing with what seems like oral thrush for sometime now, around 2.5 weeks.

I'm not sure why you have taken this long to have the additional testing discussed above. But at this point, I suggest waiting until that scheduled appointment. When you are seen, have a syphilis blood test, as well as the throat swab for gonorrhea. I still predict negative results on everything. And since you have a new partnership, it might make sense for both of you to have comprehensive STD/HIV testing to assure both of you that you are mutually free of transmissible infections. 

That completes the two follow-up included with each question and so ends this thread. Best wishes and stay safe.