I would be really surprised if this was herpes.
First, the timing is suspect. It's not impossible, but it would be really unlikely.
More importantly, the location of these bumps makes it far more unlikely to be herpes. Herpes infects nerve groups. Genital herpes, which you would have gotten from unprotected sex, infects the sacral ganglia, which would give you symptoms in the boxer shorts area, not where you're getting symptoms.
Since you can't see your doctor until next week, maybe you should go to an urgent care, or take some pics so your doc can see what it is in case it's gone by next week.
Also, just a tip - the time to ask about STDs is before sex, not after, especially if you aren't using condoms. No judgement, just educating.