Scream crying

Alyssa

My 20 week old son has started doing this scream crying when he’s upset the last 2 days. I honestly thought something was hurting him the way he screamed. And he has done it tonight when he woke up to eat. Just screams bloody murder while he’s crying. Anyone else seeing there little one do this? Just came out of no where! And he’s waking up at 11:30-12am to eat again which he hasn’t done in months. Please tell me this is a phase & will pass soon!