Okay, So I Know This Might Sound Strange, But Theres

Okay, so I know this might sound strange, but theres this.. I don't know what to call it, its like a pimple, because it has puss I guess.. but its not really a pimple bc no matter how much I try & get all of the gunk out, it comes back. And.. its in a very unconfortable place for a 16 year old girl to talk about, and I'm hoping you can guess where, but I was just wondering if I should go to a gynecologist, or someone else to have it checked out? Its not that im dirty or don't shower often, trust me, i do. Its come and gone for months, in different parts of the same area, help?