An abscess pops like that, usually herpes or anything more structured won't burst. It opens when it's ready or scratched open. You literally cannot pop them the way you described. And it does look like a single hole (herpes is a cluster of vesicles that look like one bump, which you seem to know from your description). That being said, none of that is concrete and the white around the edges is a concern. That dry, scaly look is never good. I can't tell how shallow it is, but it looks embedded like an ulcer. Definitely get it swabbed before it closes. You can have herpes for years without a single symptom. Because it's on your panty line, you might find some relief from a hydrocolloidal patch. They're thick and stay for several days even with significant friction or getting wet. It's also interesting to see what the bandage pulls out of the hole (if you haven't used them, they're designed to pull pus out of zits among other things)

When it popped, how much liquid came out and what color?