I wonder if it is just obsessive thinking. At times in my life, my obsessive thoughts have gotten out of hand--especially when they where delusional and off in "left field".

It is good to assess if your thoughts are valid or if you need to make changes to your thinking patterns. There are some great Youtube videos out there that are helpful or just talking to a friend or a good therapist can help us reassess. Happiness is developing the self awareness to make little (or big if necessary but big changes are made up of baby steps) course corrections so we grow into better people.