Introduction You've checked your heart. You've Googled the symptoms. You've convinced yourself something is medically wrong and then the tests come back normal, and you're left with the same racing pulse, the same tight chest, the same nausea that arrives without warning, and no explanation that makes sense. This is one of the most disorienting experiences of living with anxiety: the symptoms are unmistakably physical, and yet no physical cause can be found. Which leaves many