For 16 months, I have had a cloudy white discharge the is very itchy. Nine doctors have tried various prescriptions and nothing has worked. What can?

Itchy discharge. Hopefully someone has taken a culture of this to exclude a variety of infections. If not - i would insist that you be tested with a "routine" bacteria culture, a saline and KOH prep to exclude yeast or bacterial infections. Have you tried a simple vinegar and water douche? That might help. Other possibilities - a discharge due to allergic reaction to latex condoms or tampons?