Several people responded before me (below) with pretty accurate information. The nurse was exactly right. Tesearch shows that among people attending STD clinics, many who have performed fellatio in recent days complain of sore throats. However, the frequency of STD of the mouth or throat (e.g., gonorrhea, herpes) is no higher in those with sore throats than in people without them. This means that 1) fellatio itself is associated with sore throat, presumably from irritation, just as your nurse said; 2) STDs are a rare cause of sore throat; and 3) most STDs of the throat cause no symptoms.
Since your partner is obviously at low risk for STD, you can be pretty sure your symptoms are due to some combination of nonspecific irritation, a garden-variety respiratory virus, and/or anxiety. As other said, anxiety definitely could be the main problem. And as I have said many times on this forum, when a person suspects his/her own symptoms have an emotional origin, probably s/he is almost alway correct.
If you remain concerned, visit your local health department STD clinic. You will get expert care at little cost, perhaps free.
Good luck-- HHH, MD
Based simply on other similar questions I've read here, it doesn't sound like it is STD related, but a medical professional is really the only one who can help you with that, including on this format. Good luck.
Right now, I just came back from lunch, and I looked at my throat, and its pretty red, and I'm having trouble swallowing. Its not swollen though.
WHEN DOES THE DOCTOR USUALLY POST?
But seriously, you really should google anxiety symptoms. Difficulty swallowing is one of them...
Also, isn't it possible that you just have a sore throat? Or maybe even strep throat? Why automatically conclude it's a STD? So, if you don't have insurance, you can go to your health department, or depending on your income/living situation, you may qualify for your local free clinic. And while you're there, make sure you mention the intensity of your anxiety about this situation. Medication can really help :-)
I'm kind of embarassed going back to the same free clinich (which is only open on Wednesdays). Especially because I have been with only the same guy since my last visit. But is it possible I contracted an STD from the same guy the second time around?
The reason I think it could be an STD is because of how red my throat is. Its been a week and a half and my throat is still pretty red. If it was just irritation from giving oral sex, wouldn't it have gone away by now?