No risk in the event you describe.
You could get it swabbed now. Which is the best way to test because bloodtests are unreliable and you could be positive, never have outbreaks. You can never be sure if the spot you see is from hsv1 unless you swab it or it's very obvious.
But beside that if it is an hsv outbreak or not it is not from this event. Because primary outbreaks are very obvious and also the event you describe is just no risk. People don't shed virus from their neck. Also it is not in sweat. And on top it takes more then a peck for tranmission to occur.
I think your "bump" is anxiety driven. Driven by guilt since it is not your regular partner. And it is just some normal blemish or maybe whitehead. If your licking it alot or touching stop that can give a burning sensation on normal skin from my own experience.
Just sharing my opinion here. From what ive learned researching the web. No expert.