You are trans, The Doctor doesn’t know and had assumed you’re a woman. Lucky you I guess.

You decided to tell him though, so here you are. He’s leaning against the TARDIS console and looking at you as I build up the confidence, patiently waiting. “I wasn’t born female.” It stumbles out your mouth. “B- WHAT? But you- you look so feminine!“ The Doctor does his classic confused face scrunch. He gets off the console and walks up to you, holding eye contact with you. “I support though.”