This may not apply to me as I am only 20 years old, but I am certainly out the typical age range for diagnosis. I am currently seeking a diagnosis and have something in the works, but it was certainly not easy for me to find a doctor who was able to do it! I called a few places with psychologist and psychiatrists who had no clue how to diagnose it, and so I called a couple that are an hour or so away until I finally stumbled upon an actual practice that is specific to autism, child through adult. I am very lucky to have found such a place I think. It might take a couple months before I even get an appointment, but I am willing to wait. The reason I was not diagnosed as a child is because my parents refused to have me evaluated. I am not positive I have it, but I think it's very likely. You might have to call around and travel a ways to find someone that is qualified to assess for it, but don't give up! I think as the above poster stated, it will help me fully understand myself if I were to be diagnosed. I think I would feel relieved to finally know what is "wrong" with me, so to speak.