I wasn't able to get it checked out earlier in my adult life due to being a independent contractor for so long (american healthcare.... yay). Now though, I've got the time and the insurance to cover everything. It's actually a relief to know that it's not just me being incompetent.
Now I wait for a prescription and hope that sets me on the right path.
My understanding is that its a super common comorbidity (for people with Autism to have ADHD too, not the other way around)