My father died at the age of 32 from a brain haemorrage. Woke up in the morning, fit as a fiddle, by the end of the day he was dead.
I had a brain haemorrage also, but at the age of 28. I was fortunate, despite flying twice with it undiagnosed , and was determined to make as full a recovery I possibly could. Despite horrendous health issues it can be possible to recover. The most important part of it isnt the wanting to be the old you but deciding you are going to be the old you.
Sorry for your issues Mick, good luck. Determination is your friend.