Hi Annie,
I was diagnosed with this a few years ago. It was really horrible and I'm sorry you're going through it.
My doc advised that I change my diet to exclude acidic foods and drink (like OJ, any citric acid, tomatoes, alcohol, COFFEE (I had to just cut back on that), tea etc. Also, I started taking 3 - 4000 mg of calcium daily. I was concerned about this, but found that it helped so I did it. When you go to the bathroom, just dab yourself instead of wiping, which is irritating to your skin. Of course during sex use something like KY for lubrication.
I only did this for 6 months or so...can't remember exactly but it wasn't very long. I really love fruit and tomato juice and wine too much though...lol And I didn't like taking all those calcium pills.
I haven't had a problem since! I was so afraid after the diagnosis and then reading posts from other women who have had no success, but that little bit of vagina pampering, really helped.
Oh...use a mild soap like Dove, too.
Good luck and hang in there!