Seriously. "Yes, Michelangelo carved David from this stone, but I know Michelangelo really intended to create Davia."
How disrespectful that would be to the artist.
How much more disrespectful is it to tell the Living God "No, you made me, but I finished me. You made me male, but I knew I was female"?
As a Christian, we believe God is the Author of All Life. The Creator of All Things. The God of men and nature.
If God intended for men to be able to become women, would he not have made a way for it to happen? Naturally? If God intended for men to become women, why would he craft our DNA to have differences? If God intended for man to correct God's mistakes, why did He have to come to save us?
Look, if I am wrong, I am a misinformed asshole with good intentions, trying to prod you back onto a path you're (supposedly) on. If you are wrong, you are trashing What God Gave you, and telling the Creator of All Things "I know me better than you do."
Again, do what you want, call yourself what you want. But if I am wrong, I'm an asshole. If you are wrong, you are heading straight down the path to self-damnation.
I can make nobody's choices for them; God demands each of us choose of our own free will. So be very, very sure you are not making far more than a lethal mistake.