Go into the General Autism forum here. There is at least one post with links to online tests. Take the tests, save the results in a file, and print out at least three copies, one for your records, one to take with you to the psychologist, and one to take to the doc who does your testing. And definitely do bring in the notes you wrote down, as there may be stuff there that is not included in the online tests. Also, some of it may refer to other conditions that are often co-morbids with Autism spectrum disorders.
Good luck! 
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If a man does not keep pace with his companions, perhaps it is because he hears a different drummer.
Let him step to the music which he hears, however measured, or far away.--Henry David Thoreau