No one expects to suffer a heart attack. That's why they're called "attacks." They come to us at the most inopportune moments in our lives, often when we're already dealing with an enormous amount of worry and stress. Just when you think you can't handle any more difficulty, it hits.
Was your heart attack a message from your body that enough is enough? Was it the result of a congenital defect and there's nothing you could have done to prevent it? Your doctor might be able to answer these questions, but there's one important question your doctor won't be able to help you with: Where are you going to get the money to pay for your medical care and time spent unable to work?