Vanessa,
Have you been wear thong unddies??? Tight jeans? Anything that may be irritating you??? Try a salt bath a couple times a day, loose unddies and skirts for a while...it can be due to physical irritation of the area which causes inflamation of the zone (face it, God did not intend for that area to be closed off!)...if that doesn't work try a cortisone based ointment like hyracourt. Ice packs can help too.
Sharon