A childhood belief about sex

I am a male-to-female transgender. When I was a boy, I felt mostly like a girl, and I thought everyone was tricking me into thinking I was a boy because my mother wanted a son instead of a daughter. I thought this was the reason of why my hair grew so fast (I thought this was why girls usually have longer hair) and that everyone was born with a penis, but in women it disappeared during teenage. Saddly, I grew up and was proven wrong...