you probably just have a affection,,
i recon you go and see a doctor, it could be some infection or diseas.
It sounds like thrush, quite common in women, but just to be sure if it is foul smelling then you should go and get it checked by your doctor :)
go seek help from a doctor. cause chances are it may be something that you do not want . so to be sure that it is or isn't something to be concerned about you should really get that checked out .