These are some common psychological difficulties in the area of depression and negative thinking with which I have worked and may be able to help you cope. They are briefly described here but not meant to be used as a diagnostic tool.
Commonly affecting all age groups, people suffering with depression have difficulty believing that anything will ever change.
Major Depression - discrete periods of sadness, feelings of guilt and worthlessness, a loss of interest or pleasure; sometimes including thoughts of suicide.
Bipolar Disorder - repeating distinct periods of intense, high or elevated emotions and behaviors alternating with periods of low or depressed feelings.
Persistent Depressive Disorder - long-standing mild depressive symptoms.