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 latexcondoms or tampons?
Would you like to video or text chat with me?