Missy sorry to hear of your concerns. I would definitely go and see someone, but I just want you to know that my friend recently had twin girls and they have 3 older girls too. She said the babies are happiest when it's noisy. She brings them to tiny tots and I have commented that Im amazed they don't react to the noise.
So hopefully it's the same thing and noise is a sort of calming thing for Liam xoxoxoxox