"I have my own particular sorrows, loves, delights and you have yours. All of us feel sad, but when these feelings are extreme severe and continue for a long time and interfere with our day-to-day activities, it indicates that you are depressed. Family, friends, support groups, and mental health professionals can all help the manic depressive person through the traumatic event.
Physicians face difficulty in detecting depression in a person, as these physical problems can also be the cause of other major ailments or diseases. The regretful things you did in the past were not the real you, that was your sub-conscious. So, start with making the above suggested changes in your diet, exercise everyday and undertake meditation. How can something be harmed if it is permanent?.