CopingNavyBrat, Welcome to WP!
And I think I have good news and bad news for you. You decide which is which.
<=>- Even if you get a diagnosis through a formal assessment, you might not have anything you'd want to show to friends as proof. The written "Psychological Analysis" officially declaring my diagnosis is not something I'd voluntarily share with anyone except a select few...so far, just my bride. It doesn't just give the diagnosis, it also documents the information used to reach that diagnosis...some of which is rather personal. (A wallet-sized WP membership card would be fun!)
<=>- I have mentioned it to a few of my medical providers and, so far, they have not questioned it. They did not ask to see any proof. They just took my word for it. But my symptoms are mild and the main concession I want from them is to give me everything in writing; I asked for that before I had the diagnosis and seldom got it, and now I mention the diagnosis when I make the request and I still seldom get it.
<=>- And, yes, your family and good friends already think you are weird. The diagnosis won't change that.
<=>- With family and friends who are quite old you might want to just stick to being weird. This new-fangled Asperger's and Autism Spectrum stuff they might just shrug off as some silly new fad of no interest. Asperger's was added to the DSM in 1994—the year my Dad turned 64—and I got the diagnosis in 2019 when he was 89. He was obviously, deliberately not paying attention and not caring when I mentioned my diagnosis to him. (He already thought I was weird...but, I've done well for myself so I think he thinks I'm a good kind of weird.)
<=>- I have not asked for any formal, official accommodations so other folk here would have to tell you how that works.
<=>- Something some other folk here will gladly tell you is that even if they didn't make any real use of the diagnosis, the self-knowledge it gives you is wonderful!
_________________
When diagnosed I bought champagne!
I finally knew why people were strange.