Rachel, it'll take time. My mentor in college, a brilliant man who advises presidents and prime ministers, said the longer we wear a mask, the more our face conforms to the mask.
I think of being female as a role. You are new to the role and like anyone in a new role, you feel like a pretender. A newly-minted CEO, with sufficient courage to be honest, would admit to feeling like a pretender. The same with a just crowned queen.
Have you seen the great movie, "Elizabeth"? There's a scene where the newly minted queen, played by Kate Blanchett, must walk through the court, feigning a queen's confidence and strength. She manages it by pretending, but by the movie's end, there's no more pretending. She isn't just a queen, but the queen.
The more you are seen as female and the more female you become via surgical corrections, the more you'll believe you're female. Be patient. It's coming.