Wait.. I can't totally understand everything in your post but... you have medicine for some kind of vaginal condition that made it smelly and have heavy discharge?
And you've started the medicine, and the smell is gone, but the discharge is still there? Well, it's not going to go away any faster or slower no matter what you do, and there's no way to tell what a douche would do to your system.
If it doesn't smell or look weird (just thick or a lot of it) you can consider it... extra lubrication.