I also suffer anxiety. I have gotten somewhat better at handling it as I've gotten older but it's still a struggle with me. I think for me it wasn't so much little things happening that caused it as it was just generalized feelings of anxiety and fears of something really bad happening. I've always been prone to vivid and disturbing dreams too. It took something big that rocked my world for me to gain better perspective. Unfortunately I'm still dealing with it.. or trying to.