When to get baby up from sleep

I have a 6 week old. I’m starting to wonder if I react too quickly to his noises at night while we’re trying to sleep? About half the nights, we can get one 3 hr stretch, then it’s a bunch of 1.5 hr stretches, which ideally I’d like to get those to 3 hrs, as well. When he makes a lot of noise, I pull him out of his bassinet and into bed to nurse him, but he doesn’t take full feedings like he’s really hungry. When do you react to baby at night since they are really noisy sleepers?