Art of Autism is an organization that posts autistic art and writings. They've released an anthology with hopefully more to come in the future. You can try contacting them as they are always looking for new artists: http://the-art-of-autism.com/
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Given a “tentative” diagnosis as a child as I needed services at school for what was later correctly discovered to be a major anxiety disorder.
This misdiagnosis caused me significant stress, which lessened upon finding out the truth about myself from my current and past long-term therapists - that I am an anxious and highly sensitive person but do not have an autism spectrum disorder.
My diagnoses - social anxiety disorder and obsessive-compulsive disorder.
I’m no longer involved with the ASD world.