Third nipple? Mole? Skin tag?

Hailey

Okay so, I’ve had this thing for as long as I can remember. Like I’ve seen it in pictures from when I was like 8. It’s under my breast and raised up, it’s not just a mark. I just wanna know what it is😂 and whatever it is, is it possible to remove it? (It’s not something I feel I need to get removed but just for vanity reasons ya know)