I began having more serious troubles in high school. My home life was inconstant and unpredictable, which for someone who is upset even by some of the slightest of unwanted changes, this made life hell. I tried to find solace at school but that was rather fruitless. I fell into a depression, and then a psychotic depression. I became reclusive sometimes and would cut class and go and sit in the chapel for some quiet and rest (this was a private Catholic school, so there was thankfully a quiet chapel to go to).
The school (unsurprisingly) became very concerned. At that time, I had also developed an obsessive interest in schizophrenia and actually wanted to be schizophrenic. You've read books on AS that talk about children developing an interest in, say, Vikings and then dressing up and acting as them. Well, imagine that, but with schizophrenia. Although there were also some things I identified with in the condition so it seemed the best fit at the time.
At about age 17 I was diagnosed with schizophrenia, although my psychiatrist obviously had reservations but I think she saw how much I wanted the diagnosis and so caved in. I wouldn't be surprised though if on my charts she had me diagnosed as something else.
Once the stress of the time passed, as did the psychotic depression, I was still stuck on heavy medications and a diagnosis of Psychotic-NOS from a different psychiatrist.
Once I finally lost interest in schizophrenia, came back to the world of the less delusional, hehe, I began my search for why I was different. Given that psychiatry, neurology, and psychology love to label every abnormality they can, I was fairly certain I'd find a label that gave some reason to my eccentricities.
Because of some of my problems in expressing empathy, particularly to my mother, she mentioned that I may be Narcissistic. I read about it, it had some similarities, but then others, not so much. But I tried it on for awhile. In the end, that wasn't it. (Although I do realize I have some characteristics.)
Then I considered ADHD for awhile. I do have some ADHD traits (as do most autistics), so I asked my psychiatrist what he thought. He didn't say much.
But then very quickly I discovered Aspergers and the light bulb went on in blazing glory. I realized I was not the classic stereotype, especially since all I knew were descriptions of children, and usually boys at that. But I began self-researching, going online, talking, and realized "THIS IS IT!"
I went to my mother, who was originally hesitant. She only knew the DSM definition. I also approached my social worker who initially was against it, then for it, and then against it (bit confusing). Then my psychiatrist (a doctor in his residency): he was quiet and I eventually found out he didn't think I was AS at all because I was too perceptive and self-aware. At least I can be grateful he didn't give me one of those, "Asperger's is a childhood disorder, you can't have it" retorts, although he was still enough of a jerk to refuse to give me a referral for an assessment elsewhere. So, bullheaded, I sought out an assessment on my own. Unfortunately, I didn't do my research to realize I should've sought out someone with the experience in adult ASCs. Sadly, I went to a child psychologist who just thought I was depressed and needed therapy. (At the time I was depressed, granted, yet he didn't bother to find out the background, to see whether it was endogenous or exogenous depression. During that time, I was going through an SSI re-assessment and was worried I was going to lose my financial support, and my apartment, everything; I was looking for a job I didn't think I could keep because I needed to make money for when I might lose my SSI; I was applying to college after a respite; my relationship with my mother, my only support system, was rocky; and my psychiatrist, social worker, and mother thought I was crazy rather than autistic. So, yes, a bit of a stressful time.

) Needless to say, that assessment didn't go anywhere.
BUT FINALLY I had the sense (and the money) to seek out an assessment at a local autism center. By that time, my mother was also convinced I was AS after having attended a seminar with me on AS, HFA, and NLD, so she was able and willing to come to the center to be interviewed. The assessment agreed on AS but wasn't an official diagnosis. Later, I took both assessments I'd had done to a local psychologist who finally diagnosed me with AS (and also agreed, via the assessment, that the first psychologist who assessed me was a total git

).
It was a frustrating road. Painful, but worth it. Not only for my own diagnosis, but that it made me painfully aware of how much room for improvement there is in the diagnostic process; not only in improving diagnostic criteria, but in diagnostic methodology as well. And now, because I've been through all that mess, I can give advice to others online who are just starting out so hopefully they can avoid the mistakes I made. And, who knows, since I'm going into the field of psychology and research, I may be able to help make some larger contributions I hope.