What could this bump be? (Pic included)

[questions77.livejournal.com]

Hello everyone,
This is my first time posting and I hope I don't break any of the rules. I had a herpes scare this passed summer and become paranoid with things down there. I've been tested 3 times since and everything has come back negative. I just found this bump on my labia, it doesn't hurt at all and it's not flat it's almost perfectly round. It's not an ingrown hair either, I have a little too much experience with those. Would anyone know what this may be? I noticed it 2 days ago
I would realllllly appreaciate some help, especially because my doctor told me that I've just become oversensetive and almost hinted at not coming in