Is this something bad or a cyst?

i already went to the gyn and she did a viral swab and it came back negative. i had picked at it so it was irritated and now ive left it alone and it looks like this. it only feels tender if i pick at it. it feels like a little ball under my skin. not itchy or painful. the top of it feels smooth. i read you can get cysts or clogged glands there so i was wondering if anyone has any ideas. thanks!