Either way you need to go to the doctor. You can go to your local health clinic at no charge and they are not allowed to tell your parents without your consent. You are rather young to have a pap test, but you need to go to the doctor, I do not think they will require you to get a pap test but it does need to be checked out. They might have to stick something inside of you to spread your vagina apart and look inside to see if there is anything else similiar. It could be serious, and if it is caught now, if it is what you think it then it can be taken care of. Either way, you might need to tell your mom. She is your mom, and regardless if you guys do not talk about things like that, she has been through the same things you have if not more. So it might be weird, but you do need to consider telling her.