How do I know it is depression? (you do not like signs and symptoms)

People experiencing major depressive disorder report feeling five or more of the following symptoms, with depressed mood or no interest in normal activities being one of their symptoms.

• Depressed mood
• No interest in normal activities
• Feeling hopeless, guilty, worthless, or helpless
• Decreased sexual desire or pleasure
• Decreased energy, feeling tired
• Difficulty concentrating, remembering, or making decisions
• Restless or irritable
• Sleeping too much or unable to sleep
• Increased or decreased appetite with weight loss or gain
• Psychomotor retardation (slowed down), agitation
• Chronic pain or increase in somatic complaints not caused by illness or injury
• Suicidal thoughts, feelings or attempts