Shoe dropping

Waiting for the other shoe to drop. I may have this all wrong but to me that means that you are waiting for something bad to happen because you feel something is coming. I can't stand that feeling, and that is where I have a problem, sometimes I feel that something bad is headed my way because I feel that maybe I did something wrong. It is one thing to know you did something wrong, but it is another to think that the absolute worst is going to happen.