My dad’s uncle was not long for this world. Series of heart attacks and strokes I think. It was always something knocking at his door.
Well that was all 35ish years ago. Since then, not only has he outlived all my grand parents. He worked for TWA for another 10-15 years (like 50 in all), spent most of his weekends at his farms chainsawing and brush hogging and was the babysitter for his grand kids.
He’s got to be well into his 90’s now and still going.

All that to say, your best years may still be ahead of you. Hang in there.