Screaming when waking up

My baby turned 20 weeks yesterday and there hasn’t been a single day that he didn’t wake up full blown screaming. I mean screaming bloody murder. Not a whining or crying but screaming. It seriously is so loud I’m sure people outdoors could hear it. After a good long nap I’d expect him to be somewhat happy and not wake up screaming but it hasn’t happened yet. Just right now he woke up after maybe 30min and was screaming bloody murder for his paci or idk what else the reason was. It’s so loud it scares me whenever I hear it cause it’s so loud 🥵 whenever I open the door he instantly stops but cries again once I put the paci in as if he’s “scared” cause he didn’t expect someone in the room. It’s super weird and I hope it’ll pass soon. I couldn’t imagine him teething or whatever since he screams like that by just waking up 🥴