What were my odds?

I had no idea.
We drove to the hospital at 1am, triaged immediately, multiple tests and scans, and a surgeon on the way by early morning. I had a bunch of issues including a 6.5cm aneurysm and a both-ways dissection the full length of my aorta. It is truly a miracle that I am even here.
There was no discussion, no options, no waiting, and no information. They didn't tell me what was happening or what issues I really had. Or maybe they did? Or maybe they thought that someone else had told me how bad it was, and that I already knew. Maybe they thought they didn't need to say too much, so they didn't.
I actually thought I was going home.
So, now I have this constant debate with myself... would it have been better to know in advance, or to not know? What would I have done if I knew a month or two or six in advance? Or would it have been better to not know?
For my family, it was terrifying. And sitting there in the emergency department, the idea of not being around had not even crossed my mind, and before it could I was off being prepped for the most existential experience I have ever had. I was numb and the gravity of my situation hadn't worked on me - one test moved on to another so quickly that I thought the eight hours until surgery was only one.
So maybe with the knowledge of a possible surgery, it would have been better to have the time to plan and to take care of some things: personal and financial. And medical - in advance I could have had options and a medical plan. It would have been better to have the time to change things.
I still don't feel how extreme my chances were - I have run some numbers (and I know I shouldn't but I do); the success of surgery, the success of the recovery, the estimated chance per billion that I would have the issues that I had (and still have) and the even smaller chance that I would have a positive outcome. A nurse called me at home two weeks later, and I told her that in hospital I was worried I would have a stroke. She said it is common. Wow. I had open heart surgery and a second surgery the same day to remove some blockage. Wow. (So many "wow".)
My aneurysm was left too late, and this probably caused the complete aortic dissection. I don't know how long things were getting crazy inside my chest. All the combined issues I had were so rare that the hospital doctors were inviting med students to come and listen to my heart. They would say "This patient had a Triple A" and then chant off a bunch of other things, "type A, type B, dissection, root, valve...". The nurses changed shifts and just referred to me in their handovers as "the triple A patient". I was their show pony for two weeks - I felt good about that but on reflection I think the notoriety was only a sign of how bad it could have been for me.
That morning, they weren't going to let me leave the hospital.
Nup.
Oh yeah, I almost forgot. That night we called the ambulance? It never arrived. After waiting, my wife drove me to the hospital - while I stupidly insisted on staying at home. The car ride was a (another) risk that could have ended badly. But I actually think if I had stayed home and waited, things would have been much worse.
What were my chances?