I'm Autistic but neither my bride nor I suspected it until I was 64. Other than telling her my suspicions and on-line test score I did not tell anyone of my suspicions until I saw a psychologist for a formal assessment. I would never have said I was possibly Autistic
nor even strongly suspected it until I was formally diagnosed.
My bride is ADHD. She was diagnosed as a young child but did not mention to me that it was a formal diagnosis so when she told me she was ADHD I discounted it as an amateur assessment. We'd been married for almost 20 years before she mentioned that she had been formally assessed as ADHD when she was a young child. Since it was a formal diagnosis, not an amateur's assessment, I then believed she was ADHD.
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When diagnosed I bought champagne!
I finally knew why people were strange.