I have been observing changes in my wife behaviour from couple of months. Getting hyper for every silly things. And she is low always and not interacting much with me and her friends too. She lost interest in everything and prefers to stay alone inside home. She doesn't eat few days and overeats on few days. She either sleeps less or oversleeps. She keeps crying for no reason and she has tried to commit suicide once. I am worried to leave her alone. Can some one please advise if she is going through depression and what I need to do ?