Wow. Beautifully said. I'm so glad you got the answers!
I've often wondered if I'm autistic, though the informal (by a doctor in my family) "diagnosis" in my 20s was ADHD. There are lots of similarities between ADHD and autism and they're both neurodiverse conditions.
I seem to have a lot of autism characteristics, including sensory overload, singing the last song I heard, and the occasional meltdown with rocking (usually when exhausted). I have self-soothing behaviors.
When I did an online test for autism, it was inconclusive. Some results put me toward autism, some did not. When one of the options is "sometimes", it's hard to nail down.
I'm not asking for advice, just sharing and expressing gratitude to you for sharing your truth!