I really do feel that way.
When I was young (I'm talking like five), I was utterly convinced that I was born in the body of a female but that my parents wanted a boy and just had me changed around a bit. Obviously, I didn't know that wasn't possible at the time, but that's what I believed. I felt this way through out the rest of my child hood. However, as I began to go through puberty, my body went into it's own thing, as everyone's does. Therefore, I feel like (in order to maintain my sanity), I forced myself into being and seeing myself as a boy that was attracted to other boys. For me, 'being gay' was a little easier to deal with, though it drove me into dark times. I feel like if I had gone through those times as trans, I may not have walked out the other side.
As I discover my womanhood again, it requires a lotttttt of unpacking so to speak. I have to deal with internalized misogyny and transphobia as well as trying to figure out what it means to be a woman for me.