A sick note is read as permission to step back. Dream books see it as the wish to be excused from duties and to have your need for rest recognised by others.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.