My son is six weeks now, he eats every three hours during the day, however we have noticed that around 4 to 5 pm he gets super fussy! Even though I feed him on his normal schedule he seems to want more! Which I do, I just feel like I am over feeding him! I try to rock him, walk around and bounce him, offer his pacifier, etc. and rule out cold, hot, dirty diaper etc. but it doesn't help. He goes to sleep about 9-9:30 and doesn't wake back up until 3-4am. I'm not complaining believe me, just trying to figure out the fussiness! I think he's almost out of the six week growth spurt.