Thanks for your advice.. I took him to the vet and unfortunately, he didn't make it
They told me it looked as if he got stuck in the birth canal and was deprived of oxygen. He was born super fast so that doesn't make sense but they suctioned him out more and gave him something to help him breathe, but he died at the vet. They told me to just be thankful I still have four more. Easy for them to say..