Anticipatory grief
The five stages namely, denial, anger, bargaining, depression, and acceptance proposed by Elisabeth Kübler-Ross in her model of grief describe the process by which people undergo after a loss. Anxiety, dread, guilt, helplessness, hopelessness, and feelings of being overwhelmed are also common. However, it is important to note that anticipatory grief is not simply normal grief begun earlier.
Complicated grief disorder
In psychiatry, complicated grief disorder (CGD) is a proposed disorder for those who are significantly and functionally impaired by prolonged grief symptoms for at least one month after six months of bereavement. It is distinguished from non-impairing grief and other disorders (such as major depressive disorder and posttraumatic stress disorder). This disorder has been reviewed by the DSM-5 work groups, who have decided that it be called Persistent complex bereavement disorder and placed it in the chapter on Conditions for Further Study in the new DSM-5.