I believed I was a girl up until about age 8. I played with other girls, thought boys were icky, and was quite content. When I started school (age 5) I couldn't understand Why I wasn't supposed to use the girls bathroom and I sure didn't want to use the boys! (That caused some problems!) I wasn't really aware of the problem until age 8 when a male cousin said "You should have been a girl!" I said I was. He said "No you're not, not really." That absolutely floored me! I didn't understand..... but I knew I would turn into a normal girl at puberty. Well that only half way happened - my body went right down the middle and I spent the next 10 years fighting to get medical help to normalize my body. It was the 1960's so all this was pretty new territory. When I came of age I was able to take control of my life and thanks to a few good doctors finally put everything right.
So, bottom line, I thought I was a normal girl from earliest memory (mine and other people who knew me) up to age 8. From 8 to 24 I didn't know what I was but I knew I had a problem, and after 24, just a normal girl again.