I've a mate who had a stroke at 42. Smokes, loves his beer, and everyone thought that was the cause, but it wasn't his 'lifestyle' that caused it according to the docs.
He had a long yawning stretch at work, then suddenly felt terrible. Sweated profusely with his head on the table.
He caused a tear in one of the arteries running up the back of the neck, and caused a bit of the tear to travel into the bloodstream to his brain, causing him to slurr/weak left side/not really able to hold a 'real' conversation for long.
Once in hospital, his wife was reading him the riot act about his smoking/drinking, but after being told it wasn't that she calmed down.
It's a long recovery mate, with no guarantees of the final recovery percentage, but you have youth on your side.
I would like to take this opportunity, on behalf of myself and the rest of DW, a speedy and full recovery mate.