I think I was neurotypical up until I started school. My mum kept a report from preschool (all parents got a report from this particular preschool to say how their child is developing outside home), and it says that I joined in all of the group activities even when given the choice, I enjoyed song time, I was good at sharing toys with the other children, and I was affectionate (I liked holding hands with another child I was friends with). The point of this was to get themselves and your parents to decide if you were emotionally and socially ready to start school, and if you wasn't they could opt for you to stay on in preschool for a few more months until you were ready. The preschool worker and my parents decided I was socially and emotionally ready to start school (along with the other children) in the following September.
But on my first day of school I lashed out; I was disruptive, couldn't sit still, wouldn't play with the other children (even though they were the same children I went to preschool with), and the teachers and my parents were worried because they totally didn't expect me to be like that. It turns out that I behaved like that because I was frightened of school.
So yeah, I started off normal. I reached all my milestones when I was a baby, made eye contact from birth, was sociable and everything, got on well at preschool, was interested in other children....then when I was 4 years and 5 months I suddenly became this broken problem child overnight.
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Female