Concerned about a bump... 😰

[allycat128.livejournal.com]

Recently I found a single small bump on the skin between my labia majora and labia minora (somewhere online called it the vestibule). It hurt a little bit for about 2 days and now it only itches occasionally. It somehow popped open and bled a little, no white substances or anything. I'm wondering if anyone would have any idea as to what it could be. I am "sexually active", but have never had intercourse and have only been sexually active with 1 man, who has been tested an cleared twice in the past year (once on his own, once for the military) for STD/STIs. Any input would be appreciated!