Girls, can you tell me what's going on with my baby? We're a month in …

Girls, can you tell me what's going on with my baby? We're a month in now. He straight up bends over, throws his head back... Of course he still has tummy troubles, I think that's why he bends over like this. But when he doesn't bother him, then he starts acting like this too, sleeps with his head straight back.