I doubt it's herpes, but I can't tell for sure from your description. What you need to do is to have a doctor examine it and perform a culture for relevant organisms. Once you know for sure, you can either ignore these bumps if they recur, or do what's necessary. Clogged porse seem more likely than either herpes or yeast, but again I can't say for certain sight unseen.
Best.
Dr. Rockoff