Well, I suppose I had Asperger's my whole life as it's something we're born with. In the early years I was neglected so, if I did have something wrong with me, no one noticed. Then I went into foster-care and have been living with the same foster-family since I was five.
When I was nine (third class of primary school), the special-needs teacher took me out of the class and got me to play with the special-needs kids for a day. It was a lot of fun. When I went home, I told my fostermum. She got angry and told the special-needs teacher that it was inappropiate for her to take me out of class like that. I wasn't allowed to go play in the special-needs classroom again after that. I might be wrong but I think the teacher that took me out of class knew that I had some form of autism. My behaviour prior to that was disruptive, so maybe that's how she knew.
When I was twelve and started secondary school, I found the change difficult: secondary school's a lot different than primary school. I was disruptive and very disorganised. I ended up getting suspended in that first year (before becoming super-quiet throughout the rest of secondary school). In that first year, one of the special-needs teachers started teaching me on an individual basis every Monday, to help me be more organised. The teachers definitely knew I had autism at that stage. Again, my fostermother said that they were lying. She managed to take me out of special-needs class the next year.
Then, when I was sixteen, my behaviour started becoming very disruptive again. My social worker got contacted and, to my fostermother's dismay, I was made get a diagnosis. I got diagnosed shortly afterwards, in Easter 2012 (by which time, I was seventeen).
I'm meant to be getting a reassessment now that the state exams are over but my fostermother hasn't talked to me about that yet. I doubt she ever will, to be honest.
TL;DR
1. I've had Asperger's since I was born.
2. Teachers started finding out when I was nine. My fostermum didn't beleive them.
3. Teachers definitely knew I had some form of autism by the time I was twelve. She didn't believe them.
4. I got an official diagnosis when I was seventeen. She's still in denial.
5. I'm meant to be getting a reassessment now that the state exams are over. She still hasn't talked to me about that.