i had a pimple like thing that appeared near my vagina a few days after i shaved. it hurt like a pimple and popped like one too. i then used a vagisal wipe and went to sleep. when i woke up it was gone and no mark or anything. i have been with the same guy for 14 months and am 100% sure he has not cheated. and if i had anything before we started going out, would he have had symptoms already? i am a little worried.
Honestly...it sounds exactly like what you guessed it was...a clogged pore or a pimple. I would not worry about this. But if you are still concerned you can always discuss things with your gynecologist. It doesn't sound like any STD that I know of.
Talk to your doctor if you are still worried.
Thank you for your question.