I can understand your body is undergoing a lot of changes, especially as you have reached an age (or might be experiencing a slightly delayed menarche
as well) for you to expect your periods.
As your description is still a little vague it is difficult for me to comment on whether these are the skin folds or labia (major or minor) that are around your vaginal opening.
If this is not the vaginal skin then this will have to be looked into. A doctor will be able to tell you whether this is normal or not.
If this is indeed an abnormal growth then I would request you to start by asking your mother if she has any sexually transmittable infection that could have been transmitted to you, and then get the extra growth tested as well.
But I am sure this is nothing serious. Visit a doctor who will surely clear all your doubts.
Hope this helps.