There is no real accurate test for Depression or Bipolar or Anxiety disorders. If you notice you have some of these symptoms & behaviors, seek out competent medical advice. You must be evaluated by an “experience & qualified” doctor, and you must agree to the diagnosis. Most “medical doctors” have no mental health experience, or only 4-8 hours of training. And even professional’s can get it wrong for a variety of reasons. Going to support meetings (Dbsa / Nami) where people openly talk about their mental illness, can go a long way in helping you decide.