From what I read about "not having the right" to feel the way you do, it seems like you are feeling guilty about feeling depressed? Keep in mind depression affects all types of people and you are not the only one. Working is keeping busy but it's work. Try to take care of yourself, do something that is just for you, like going for a walk or reading a good book etc. Do you have any idea what may have triggered your feelings? A counsellor may help you find out.