I too share your extreme fear of dying. I constantly think about will it be painful? I don't want to leave my family. And who knows WTH happens after you go. I usually get tight in the chest as well as my blood pressure skyrockets. When it happens I find a hug from my wife or kids sometimes helps or I try to find a way to keep busy so I don't think about it or I try to do something that makes me feel good. I often hate myself for worrying too because why I have an immense fear over something I have no control over it rules certain facets of my life. So instead of just living and enjoying my time here I'm worried sick about it happening. I'm right there with you.