Hi Soccermom!
Sounds like you are doing great work already. I think incorporating more dilation will definitely help. There is a great book by Heather Jeffcoat, PT called Sex without Pain that has instructions on how to use your dilators more effectively to further stretch the muscles. Using the dilator to apply pressure to the left and right side, or to an area of increased tension can be helpful.
I love that you are using the compounded estrogen for the vagina and vestibule. Really massage the cream into the entrance for 30 seconds, it will be more effective that way.
As for the vaginal valium, you might get better benefit if you use it on a regular basis, every other night or every night, so the muscles are continually exposed to the muscle relaxing effects of the valium.
I hope this helps. Melissa