I have pain in vagina , vulval vestibule and libia minora for 3 weeks now. i think it's due to excessive washing with water. what should i do?

See a doctor: Your symptoms may be caused by infection or vestibulodynia. Vulvar vestibulitis syndrome is a common cause of vulvar pain that affects premenopausal women. If infection is present, it should be treated. If infection is not present, treatment includes avoiding tight fitting clothing, perfumes, or dyes. Other treatment options include oral and topical medications as well as biofeedback.