Welcome to HCM,
Have you only consulted General Practitioners, or consulted gynecologist & allowed examination. Vaginitis
can be due to bacterial, protozoal or fungal infection
. Color of discharge can give some idea. Consult a Gynecologist if not already consulted. Don't change doctors to frequently. To know the infecting organism and effective drugs, you should get culture & sensitivity of your vaginal swab done. Meanwhile you can apply ointment like Surfaz-SN on the itching skin out side of the body.
Wish you good health,