Hello! I'm A 14 Year Old Girl And I've Had

Hello! I'm a 14 year old girl and I've had this bump on the interior of my labia majora for a while now. It hasn't gone away and has only begun to hurt if I apply pressure to it. I shave regularly and haven't ever had this before. It's has two purple dots right above it, under the skin. And pus has come out of it before. it seems to have gotten better since the first time I squeezed it out but it's still there. What the heck could it be? I haven't ever gone to a gyno before. Is this something I should have checked out? Thanks!