I am a mother of two but not really a expert with babies but my 4 week old baby is displaying such signs as well.
What I noticed is he tend to fall asleep when we carry him (seems like he likes to stick chest-chest or listen to our hearbeat). Once he is deep asleep then we put him down to bed. (we usually tie 1 hand at night and sometimes 2 hands - swaddle)
My baby boy seems to like pacifier more than his elder sister so we introduced it to him....but when he is hungry, he scream down the whole house, totally no patience to wait for us to make his milk for him. I am more of the type who will give him anything just to soothe him (for now).
My baby boy is also introduced to yao lan...first 2 days he was not used to it...but 3rd day onwards, he kind of accepted his new napping bed.(yep, I only use yao lan in the day)
When my baby boy poo, he also likes to scream and wriggle his tiny body. When we are changing his diapers, he will shows signs of anger and will be screaming as well. But after he has his clean diaper, he will quieten down.
I think babies have alot of pattern. I am also quite afraid cos I am going to start taking care of him alone in th next 1 hr - CL going back. Wish me luck! And hope this helps.