Screaming?

Hey mommas, I’m in desperate need of help. My 20 mo, is excessively screaming. We brought his newborn brother home on the 4th, but he is still getting all the same love and attention. He absolutely adores his brother, but lately (literally this week) he has been excessively screaming. If he gets upset, he screams nonstop for as long as it takes for someone to try to pick him up and calm him down. He screams whenever he’s excited, he screams whenever someone walks out of the room, he screams whenever I’m nursing. I’m honestly about to lose my mind. Any ideas on why he’s doing this/how we can help him stop? It wouldn’t be so bad if he wasn’t keeping the newborn up/making him cry as well. But having two babies screaming and crying is too much for my sanity being only a couple weeks postpartum.