I've had a colicky baby who cried not because he wanted to nurse (he would stop wanting to nurse after a certain point) and not because he was hungry. There are a certain percentage of babies with colic, we don't know why they cry but they cry and carrying them, nursing them, feeding them breastmilk through a bottle doesn't really help.

Then for our son, it grew less and by the time he was 3 months old, he was a very happy baby.