I also do that but mine is all mental related, I think I have schizophrenia, I think I am going crazy, I think I have a brain tumor, I think I will turn pychotic, no matter what I read that has to do with a mental condition I think I do or will eventuallyhave it! lol Sometimes I have to laugh at myself over how rediculous I sound. I had to ask my mom, my sister, my therapist adn my friends all if they think I have schizophrenia, only because I read that a person with it feel anxious! haha Yea So when I am calm and tell myself its only anxiety its almosta relief. I feel you though, I think thats one of our lovely symptoms of anxiety!