29 days old infant feeding and sleeping issue

Will

Hi everyone. Our little boy is 29 days old today. He has some jaundice and we are trying to breastfeed to hopefully remove it. We check eith doctor and everything seems okay at this stage.

Today we experience something a little different than usual. Our boy for the first time slept to nearly 4 hrs and we had to wake him up to feed. He usually woke up on his own between 2 to 3.5 hrs sleep. Yesterday he is not sleeping well too with lots of grunts and generally I think he is not cokmfortable. Wondering if this is usual? He has no fever or anything seems alright with appetite too. We are not sure what is right. Please help. He is becoming abit fussier this last few days after feeding as well. We have to use pacifier to calm him down.