Riley has just started screaming, at the top of his lungs, at the highest frequency known to man - I swear he could break crystal. He's been doing it for about a week, and does it all day long. When he's happy, playing, sad, crying, frustrated, etc. He is literally hoarse and coughing at the end of every day!
I hope this is just a phase because we cleared out an outdoor restaurant the other day. People were literally covering their ears and running away!