I hate that phrase! What have you got to be sad about, you have so much going for you. Baloney, sometimes the happiest times of my life turns into depression. Stress is stress, no matter if it something good that is happening or something bad. It affects me. Thank Goodness, I found a Christian Doctor ( who has retained me as a patient for those of you know that story) who recommended me to a wonderful therapist that I dealy love. She's cut me loose telling me that I'm doing great, but if I run into trouble with SAD to call her and we would have regular appointments again. She's wonderful.