Let me start this blog by saying all feelings are normal.  All of them. Sadness, anger, frustration, fear, anxiety, happiness, joy...all normal.  For this reason, to some extent depression is normal too. Short periods of depression for say a couple of hours, a day or two, even sometimes up to a week is normal.  Knowing the signs and symptoms of depression can help you decide when it is time to reach out for support from your doctor or a trained therapist.