I feel for your anxiety! Let me say that we can be GREATFUL that you and your doc know! So lucky because you can now expect to live without a surprise ( like a heart attack/stroke) and other emergencies which might have been hidden from view. My father swam three times a week and he had a heart attack at 58 and had to have open heart surgery or valve replacements and valve replacements. He had a triple heart bypass when he was 72 he had a quadruple heart bypass and when he was 80 he had a triple heart bypass in between, he went in for various angioplasties. I was just diagnosed with coronary artery disease at 67 and it came as quite a shock. But fortunately, I live my whole life eating and exercising properly and I ended up with three clear arteries and one artery that is one third blocked. But that’s better than having had heart attacks strokes and dying like my cousins did in their 50s and 60s Because they didn’t take care of their diet and exercise. Aging isn’t for wussies they say. and I think they are right. Every other year I go for some major joint replacement and surgeries are just incorporated into a way of life. The alternative is to be debilitated or dead by the grace of God we go I hope this isn’t depressing but optimistic to help you, you’re quite fortunate that you were 50 and you will have many great years ahead of you as you adjust to the hand you are dealt. Absolutely no one ages without some thing they have to deal with some people have many things they have to deal with just find what inspires you and your passion to carry you through the difficult times and the struggles , enjoy your family. You can still do the food. You can still eat the social circles you can still have, etc. I have found even my long recuperations are a place. I can enjoy things with total abandon like reading and sitting still there is a silver lining to every cloud good luck to you !