I feel you on the irrational fears. I know for the most part that my fears shouldn't come up as regularly as they do, but I still have the constant thoughts of what could happen. I try to remind myself to live in the present, do not think of things out of my control, and to counter negative thought with positive thoughts but it is a struggle every day and it is very difficult. I am working with a therapist and doing "homework" to get things under control. It is not easy. I think of everything that could go wrong and it will probably be my fault. You are not alone in your feelings.