If you're not sure if you're depressed or not, or if you don't know if you qualify for the DSM-IV diagnostic criteria for depression, you can always take a test to see if you qualify. Many tests will divide by results by mild, moderate, and severe depression. If you have clinical depression, you should see a psychiatrist. The test may point you in the right direction, but it is not a substitute for a psychiatrist's opinion. Psychology Today has a free online test.