How to know if i have clinical depression?

Seek psychiatric: Eval. Depression sx’s can include feeling sad, irritable or angry; v in sex drive ; energy or motivation levels. One may socially isolate or stop involvement in normal activities. Sleep, appetite ; weight may ^ or v. Concentration, memory ; self esteem may v with an absence of joy, feelings of helplessness or hopelessness. There may be crying spells or thoughts of death or suicide.