Vaginal lump

Sorry guys but I've noticed a small lump about the size of a pea on my vagina lips (flaps) and I'm a bit concerned because I'm unsure what it is and what I need to do to get rid of it or why it's even there!!! I'm 15 so don't want to have to go point it out to a doctor unless I have to at the moment I'm leaving it to see if it goes away I noticed it about a week ago and it hasn't grown at all it's quite firm and hurts to squeeze it. What is it? Why is it there? And how can I get rid of it? Also can I still receive oral from my boyfriend without causing him any problems? Thanks :)