Am i suffering from depression and should i see a psychiatrist or psychologist?

Both: The best treatment for moderate to severe depression is a combination of talk therapy (psychologist) and medication (psychiatrist). For mild depression where little social or occupational impairment is present, talk therapy is fine, especially coupled with physical exercise.

Either/and/ or: Either a clinical psychologist or a psychiatrist can do a comprehensive psychiatric evaluation. A psychologist may refer you to a psychiatrist if psychiatric meds are indicated. Some psychiatrists provide talking therapy (i do) but the psychiatrist might also refer you to a psychologist for this purpose. Many people see both a psychiatrist and a psychologist.

Severity: Get a psychiatric evaluation to determine severity of symptoms of depression. Medications may be warranted. Also find a reputable psychotherapist to help you figure out what depression means to you, and how to better deal with it. Optimally medication and therapy together works best.