That's what this is all about, though - we are just being ourselves - in many cases after trying for some time to conform to societal expectations based upon how our bodies were configured at birth. Nobody asked us then, because there wasn't a person to ask yet.
This is what I don't understand. If you don't want to conform to societal expectations based on your sex, just don't. Be who you want to be.
Based on the rest of that paragraph, though, I wonder if what you are saying is that society expects men to look a certain way? If you are talking about men's physical appearance (height, hairiness, hip-to-waist ratio, eyelash length etc), then that is not dictated by societal expectations - that's just how men look relative to women.
So I don't understand what you mean by "societal expectations" if not gender stereotypes, which most people chafe at to some extent and many people break out of through their behaviour, or mode of dress.
Also
..based upon how our bodies were configured at birth
This is interesting phrasing. There are only two possible configurations of the human body, one female, one male, and they are dictated by the respective reproductive roles. The presence or absence of sex organs is not random. If you are male, you get the organs in column A, if female, you get those in column B. That's the way it works - you have testicles because you are male, you have a uterus because you are female.
Sex in human beings is determined at conception and cannot be changed.
I believe you when you say you have a strong belief or sense that you "are" a woman, I just know that that belief is false, because being a woman is the material reality of a female sexed body. I don't need to know how you feel to know what you are. Nobody has to meet me to know that I cannot fly or breathe underwater unaided.