Anxiety seems to come from nowhere for most people, and strike them like a sledgehammer. One minute, living your life more or less peacefully, the next, frightened and depressed, maybe struggling to breathe, convinced you're dying, or someone else is going to die, and it's all going to be your fault. Perhaps you're seeing a doctor right away, maybe you're struggling on your own for as long as you can, but you're going to be told sooner or later...