Welcome to the forums! I'm new here too but have found it to be a really great place. It is still a little strange to me to be able to communicate with people that actually make sense
I had the same problems with smiling. The laugh-to-smile idea is brilliant! I wish I'd thought of that. I used to just practice in front of a mirror a lot. Eventually I came up with a lips closed smile that seems passable.
I was just diagnosed last Monday, and trust me, I have a ton of adaptive behaviors. The tests don't really focus on that surface stuff-it says in my diagnosis that I was well-groomed, generally made appropriate eye contact, lots of things that I've learned and practiced at over the years. But there are other characteristics that are not so easily faked-how I describe a picture, my ability to understand a question, that sort of thing.
If you have the resources and the opportunity, getting the evaluation, whatever the results are, may be very helpful to you. It will be a detailed examination of your mind, and might open you up to some things you would never have thought of on your own.
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RAADS-R: 176.0
ADOS-2 Module 4: 9 (Autism Spectrum)
EQ: 7
AQ: 35
Diagnosed with ASD Level 1 15 Jan 2016