How long is he awake for usually? Then maybe we can see if he is UT or OT.
There is also a 6 week growth spurt so he might be a little extra hungry - is he bottle or breast fed? Also, even the BW says it is tough until after 6 to 8 weeks to get baby on a feeding schedule since they are still so young and your milk supply still needs stimulation.
Lastly,
Maybe try a little extra burping? That used to make my LO cry. Hope this helps!