Pain in vulva is due to vulvodynia which can be due to many causes like persistent vaginal yeast infection, irritation to antifungal treatment , sensitivity or allergy to something touching the vulva, such as soap or bubble bath, a drop in the hormone oestrogen, causing dryness of the vulva, stress, lichen sclerosus or recurrent herpes simplex infection.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.