My DS screeches and screams all the time. It has got so bad recently that I can't go out for coffee or lunch with pals as he is so earpiercingly loud. It gets worse when he is tired but he keeps it up consistently all day; it's as if he is frustrated. I look at all the other babies asleep in prams and mothers enjoying their lunch and wonder how I can get him to shut up! It's been going on for a good three months. Has anyone else experienced this at this age?