myxasia,
I am a bit sorry for making fun of your topic, but it was just too good and I could not resist ;-)
If your doctor does not have experience with trans issues and is not willing to learn, you should bite it and find someone else. You might however try and help your current doctor first by finding solid information to aid them, but if they won't listen, it is your decision whether you want to stick with them.
My endo prescribes only bioidentical estradiol and bioidentical progesterone, and they have many trans patients and many years of experience.