Nope, not weird at all! That sounds like something a lot of young survivors would find familiar. It's one of the great tragedies of being an abused teen or youth. You discover you have been forced to accept adult responsibilities or endure horrors of the world that no child should know about. In order to survive you have to deny who you are - just a kid.
I remember going to school and feeling like an alien in a "Larry" costume. On the one hand I wondered why no one could see what was happening to me; I felt so abandoned and alone. And on the other I dreaded the day someone would discover what was happening to me. After the abuse ended those feelings got worse, not better.
And yes, it absolutely sucked.
Nobody living can ever stop me
As I go walking my freedom highway.
Nobody living can make me turn back:
This land was made for you and me. (Woody Guthrie)