I think I've finally internalized it, or at least I'm starting to internalize this. My body does not disqualify me from, or even call into question, my womanhood. I was a girl when I was born, I'm a woman now, and no set of circumstances is ever going to make that more true or less true (unless I discover some more accurate understanding of my gender).
My genitalia has no say whatsoever in how masculine I am, how feminine I am, or who I am as a person in any way.