What are you tired of?
If you think you may have a depression, do see a doctor. I was clinically depressed for a few years before I recovered through medicine and therapy. Real depression (as opposed to feeling a little down) is a clinical disease and it happens to lots more people than you can see, so it is not something to feel ashamed over.
If you are chronically fatigued, then you should also see a doctor to get your blood glucose and hemoglobin values checked.