Is this how i feel...? Major depressive disorder (depression) is a serious medical condition with a broad range of symptoms. Emotional symptoms can include sadness, loss of interest in things you once enjoyed, thoughts of death or suicide, and feelings of guilt or worthlessness. Physical symptoms can include restlessness or slowness of speech, thought, or activity; trouble concentrating or making decisions; lack of energy; and changes in weight/appetite or sleep. Associated symptoms of depression may include aches and pains, tearfulness, constant worry, dwelling on negative thoughts, constantly turning things over in your mind, irritability, and anxiety.
Where Does Depression Hurt? Someone with depression might think or say any of the following: "I feel sad all the time and just don't feel like myself." "I don't enjoy being with my friends or doing any of the things I usually love to do." "I've been having a lot of trouble sleeping lately." "Sometimes I feel like my life is not worth living anymore." "I feel like I don't have any energy." "I'm not really interested in eating." "Even after a long day, I still feel restless." "I feel so indecisive and I can't make any decisions" "I just feel so worthless."
Family History May Be Important. People with a family history of depression may be more likely to get the disease, but anyone can become depressed. Sometimes the triggers are external–for example, relationship troubles or financial problems.
http://www.cymbalta.com/Pages/understandingdepression.aspx?WT.seg_1=MDD&DCSext.ag=Recognize%20Condition&WT.mc_ID=GGLMDDDepression&WT.srch=1