Bump on vagina

Samantha

Hey guys I have been googling and nothing really is coming up, so thought I’d bring this concern here! I have a bump on my labia majora at the top of my vagina kinda close to where my clitoris is (that’s the best I can describe the location lol). It just appeared one day and it’s super painful. It’s tender to the touch, hard like a rock, and it’s under my skin. I’ve tried looking at it in the mirror but it’s hard to see anything! I don’t shave so I trimmed and still can’t see anything? It feel too big to be an ingrown hair and I don’t think it’s an sti. Does anyone know what this could be/what I should do?