is yr baby a boy? If so, on the whole boys are more impatient than girls. Or else they are too hungry to suck. Is your milk flow enuff for him/her? Becoz if latching on takes some time before they can start feeding etc or waiting time too long they will start to fuss.
if its too difficult to latch on for feeds, try all pump methods. Always pump beforehand. At least you can see the amount of milk yr baby needs before he/she is contented. Otherwise wait too long and they might be too hungry there it goes again - cranky and cries.
my boy at that time takes 2 oz of breast milk/fm every feed, sucks fast and impatient...a little bit slow also cannot wait...so its very panicky to feed him...cannot delay one. Becoz he sucks fast he finishes his milk very fast --less than a minute. And normally he falls asleep while burping...so i used all pumping method to feed him, just cannot latch on coz too impatient for him already. And he needs to be fed every 1.5 hr apart...very hungry and impatient baby.