Dreaming of a belly button means you are searching for your past and a time of innocence. Your current frustrations or difficulties can only be alleviated by understanding your past. Without the past, the answers may elude you longer than necessary. In addition, you may remember a time of innocence previously, but difficulties have taken its toll on you.
Focus on finding your past, of how it shaped you to be who you are. Dive deep into your belly button dream, and you will come out as a better person.