I feel for you Loopsie,
I'm two weeks in a flare up too, all the same symptoms as you extern pain, I had to wait 6 days to see my doctor as she was busy and Australia Day holiday. My doctor told me I could reload or increase to three times a week. As I was in constant burning, I decided to do two weeks reload. I never did it at the start as my doctor said didn't need to because I was already using Ovestin.
I'm now halfway through my loading. It took me 5 days to start getting better. Still hurts but only mild pain. I'm also using Ovestin externally every second night. At the moment I'm finding he nights I'm using Ovestin, the next day even better.
This virginal atrophy is terrible, good luck to you