Once I 'matured' and got into puberty and stuff, I was really shocked. I didn't want my breasts to grow (They listened when I said they had to stop! Cause they stayed rather small too!

) or get periods (I hid it for three days the first time, until my mom found out). I was late with them, at my 14th I still didn't have them, and when a GP expressed her concern I was extremely annoyed, cause I was HAPPY with it.
But I'm not sure whether this isn't just normal for all girls. I don't know whether there is even ONE happy with periods! Lol!
And since puberty I really started to feel disconnected from my body. I stopped caring for it properly (like not washing enough, not applying deo (God, I must have smelled so bad! Lol), not treating the acne on my face but picking at it, eating lots of unhealthy stuff, just because I didn't care). It felt to me like it wasn't 'my' body. I didn't feel proud or happy to show it to the world, and I would usually wear way-too-big pants and sweaters and never less than a t-shirt and shorts unless for taking a shower.
I also played lots of MMORPG games (in which I was always a guy. Not even consciously, it just 'felt better') and read a lot of books (not necessarily unhealthy, lol

but it was a method of escapism for me) and got quite absorbed into them to the point of neglecting everything else.
Not sure whether these are dysphoria signs, I didn't interpret them as such at the time anyway, but right now I think the underlying cause of these problems might actually have been gender dysphoria. Especially the feeling of being 'disconnected' from your own body, like it's 'not yours'.