However, above all else denial is an unconscious defense mechanism characterized by refusal to accept the reality of death. Depression is a deep sadness at the loss often accompanied by hopelessness of the occasion. Depression results from an emptiness in your life that can't be filled. Some symptoms would be the inability to concentrate insomnia. Depression often requires professional treatment.
Guilt wears many hoods.
Very few of us escape feelings of guilt. For example, I will worry for the rest of my life, whether something I did or didn't do in caring for Kathy might have lead to her death. As it relates to violent or natural death is a psychological mechanism, a fog that allows us to function, sometimes even efficiently, at very devastating times in our lives. Much of what happens during this time we will never remember. This fog will protect us for days weeks and sometimes even months.