Bump on my inner thigh

there's a long bump in my bikini line, it's really painful.. I've been reaearching they says it ingrown hair but it's not because i didn't shave for the past week, and the bump is not located on where my hair grows.. it's been like 2 days & it's been really painful. I really do not know what it is. It really hurts when I walk. Anyone who encountered this?