One week ago, I had an encounter with another guy who started to masturbate me. I didn't ejaculate, and it was only for a few minutes. I know that he has had an oral herpes sore before, but didn't at the time. I am not positive, but he may have spit in his hand before touching me and also could have touched his own genitals before/while touching mine.
I've only had sex a couple times, both with women and several months prior, and this was a random, short encounter, but now I'm worried. As soon as the next day, after realizing that he'd been exposed to at least oral herpes, my entire penis felt sensitive–not irritated, but just more sensitive to clothing, etc. After I didn't show any symptoms for a few more days, I just wrote it off as worry-induced. But now, exactly a week later, I noticed a small red bump that's appeared about midway on the top of my shaft. No itching or pain or anything, but it definitely wasn't there before.
I'm looking for advice or opinion on the risk of this being herpes. If the bump begins to itch or show discharge or if more appear, I'll be more worried, but I'm considering trying to make an appointment to get looked at tomorrow.
Thoughts?