Hi Nox
Your baby could just be trying to tell you that he is scared and confused. He has recently entered a very new and strange world. He is used to living in the dark where all the sounds are muffled. And now he has been placed into a bright harsh world
All of the above are great ideas. You could also put your baby face down over your knees pat his bottom and sing/talk to him. Or cuddle him so that he can hear your heart beating or the rumbling of your tummy