Break a doctors ego, save a life. The amount of people who die because of doctor negligence is too many.
If I were you I'd try to do two things 1) try and get a second opinion/ second endo and see what they say. If this is not an option then 2) work up as much courage as you can, find as many medical sources you can about microdosing, go back in there, and tell her you either want a microdose or you will talk to someone higher than her to get the medical treatment you NEED. Be firm.
I know it's hard and confrontation is really scary, but this is your life, you deserve happiness and some ignorant doctor shouldn't stand in your way. Much luck and love!