Welcome to the forum.
I don't think you have anything to worry about with respect to herpes on account of the sexual encounter 3 weeks ago. Although herpes symptoms listed on many websites and other education resources include some of the symptoms you describe, they usually fail to clarify that such symptoms occur only in conjunction with typical herpes outbreaks -- i.e. blisters that become sores and heal with scabs, typically over 1-3 weeks. Occuring by themselves, without the painful or itchy lesions, do not suggest herpes -- and they especially are incompatible with a newly acquired HSV inection. In any case, you had a very low risk exposure with regard to herpes, especially since the vaginal sex was condom protected.
As you already apparently know, you could be tested for antibodies to HSV. Or you could speak with your partner; if she has been tested (or if were testedat your request) with negative results, then obviously there was no risk. (If you contact her, do it diplomatically and sensitively. And believe her if she is confident she isn't infected.) However, there is no other way to know until antibody tests are done at least 3-4 months after the exposure.
But I strongly recommend against testing at all. If you were to have a positive result for either HSV-1 or HSV-2, it would only mean you have asymptomatic HSV infection -- plus some other cause of your symptoms.
As for "I can't move on in my life until I resolve this", that's a rather substantial overreaction. Nobody wants genital herpes, but it's not that big a deal for most infected people. In any case, combining the low risk nature of your exposure plus the absence of symptoms that suggest herpes, I suggest you do your best to put this event behind you and move on.
Best wishes-- HHH, MD
Thank you for your reply Doctor, I appreciate your advice.
I feel like I should clarify myself a little here. The reason why this is such a concern for me is that I dread the possibility of being a "silent carrier" of an STD and unwittingly infecting someone else.
With respect to the partner in the encounter, we did have a long conversation about this. She has never had any sort of symptoms of HSV to her knowledge, nor has her last partner (whom she was in a three-year relationship with). As far as both of us know we've never had cold sores either (if I have it was when I was like, five years old or something). Based on that conversation I would feel quite comfortable with the situation as I do trust that she is telling me the truth and also seems to be quite concerned about her health as well.
However, the feeling of itching/burning is what caused alarm. Had I experienced not symptoms I would have thought nothing of the encounter. However I experienced something that is listed in places as being a typical reaction to a first time HSV infection (though it sounds like you disagree with this statement).
Combining that with things I keep reading like "1/3 people with genital herpes are unaware they are affected and can infect others" and "people who are infected often don't experience/notice symptoms, or mistake those symptoms for something else", I'm left with no choice but to wonder if I'm in that category, and I feel like I need to be sure that I'm not. It's especially difficult since I can't find an explanation for those symptoms.
You recommend that I not be tested for antibodies as it could just mean I have an asymptomatic infection. Wouldn't that mean that if I were to test positive I could still be a carrier and therefore a risk to infect others? I feel like if that's the case I should be aware of that. Unless I misunderstanding how these test results work.
I saw this before my reply above.
Also, I should indicate that I have been tested for gonnorhea, syphillis, and clamydia and everything is OK there.