Nightly Fits

My baby boy is only 12 days old, and every night he screams no matter what I do, unless he is feeding. He is changed, Fed, burped, and even cuddling won’t calm him. It’s only at night, as he sleeps most of the day. What can I do to calm him in his fits? Nights have been hell and I haven’t gotten more then an hour of sleep here and there since he was born.