Most unlikely to be herpes that would show up within a week and be multiple sores for an initial outbreak.
Could this be an infected hair follicle or boil?
This does not sound like an initial outbreak of hsv.
Let me ask a few questions so I can better understand what you have going on
1 how long has the bump been there?
2 has it changed to a fluid filled blister?
3 is it painful?
4 where is it located Exactly?
Now it would be unlikely you contracted hsv from a single encounter. Especially if no sores were present on his penis. also the initial outbreak usually happens within two weeks and would most likely come with flu like symptoms. Fever, body aches, swollen lymph nodes and painful lesions. The fact you are over a month past eexposure is a good sign you did not contract hsv from this. Have you asked him if he knows his status for stds?
Thank you for answering! I just noticed the bump earlier today, it does look like a blister (though it's hard to get a good look at), it did hurt when I touched it, and it is located right next to my labia. I do not know if the man I slept with has and std's.
No concerns then I suggest. The timing is the key thing. At more than a month heroes is not a realistic possibility.
Thank you so much, that's a huge relief to hear!