Hi mama,
Which ever way you go, do it for your own peace of mind,; not for anyone else or any other reason.
At your age (in my country at least) there are no benefits and concessions from the government and I believe you need to be dx as autistic (by the old definition of the term) at a young age before you are entitled to anything.
You seem to have a very successful business and have raised children, so I think that despite your struggles you have done very well and better than most in society.
I got my dx when I was 43, but it was only for me, so I could "tie off that loose end". But I knew a year or 2 before the dx that I definitely had Aspergers. That moment I discovered it for myself, everything in my life till that point finally made complete sense. The piece of paper was just a classic Aspie need for doing things correctly and to their conclusion.
But it never got me ex-wife to accept me, it never saved my divorce, it never got me any apologies from organizations and people that I was mistreated by. It just gave me a formal reason to go with my self-diagnosis as to why I think and act a certain way. So I gave myself the concession and allowed myself to be different and no longer beat myself up over things I could not do.
I realized I could finally stop trying to measure myself against others and rating myself as inferior.
But like I said, that didn't come from the piece of paper. It came from learning about my son's condition, which in hand taught me a lot about myself.
If you have discovered for yourself that you have Aspergers (and when you know, you know) then you can do the same. If you want the piece of paper to go with it, then tie off that loose end.
Otherwise, save yourself the exorbitant Aspie-specialist psychologist's fees for how ever many sessions it takes to get your DX.
Also, if the psychologist says they can DX you in one session then they are lying. I'd say it would take a good psychologist 6-10 sessions. But it would take a fellow Aspie 10 minutes

Because other (self-aware and articulate) Aspies just know - it's like a radar.