My baby is exactly the same, he will be 4 weeks on Friday constantly making moaning and groaning sounds and sounds like a sheep sometimes x
Mine is 4 weeks and doing this too, I wasn't sure if something was wrong. She wasn't as fussy as this during her first week or two, and now she's very clingy and fussy, and spends hours fighting sleep only to end up overtired and she grunts and groans, it sounds like she's all blocked up but she's not ill
My midwife said to me that around 4 weeks they tend to become more fussy and vocal
It’s totally normal, my LO is exactly the same.