My 3 month old has recently started popping off the breast frequently once we get about half way through a feeding, and starts to get angry. I can't figure it out. He'll relatch himself, even when his face is turned away, so it's not that I'm shoving my nipple in his mouth when he doesn't want it. And he's often relatching aggressively, which makes me thing he's still quite hungry. I'll check with a little hand expression into the receiving blanket, and there's usually still plenty in there, and the flow doesn't seem to be too fast or two slow. He'll take a few pulls, then turn his head away, then come back, then pull off again. And after a few minutes, he actually starts to get quite angry, and begins to cry. If I put the boob away, so it's nowhere near him anymore, he stops getting angry though, and will just be content looking around.
On the one hand, maybe he's not hungry anymore, and getting upset that there's milk, but then why is he latching back on with such aggressiveness? He doesn't seem to go too strongly for his hands in those times, and won't keep a pacifier in his mouth, so I don't think it's just a need to suckle.
Or maybe he's upset because he wants it to come faster? He doesn't usually do it when I give him a bottle of expressed milk, so this does seems likely to me. But I don't know what to do about it if that's the case. He really doesn't get bottles all that often (dream feed is the only regular one), so I wouldn't think he's refusing breast because he prefers the bottle, as he doesn't get a bottle often enough (when awake) to make a faster flow something he'd expect.
He still has enough wet diapers, but it feels like they aren't often as wet as they used to be. But then that could be my imagination, because I'm looking for it.
Is this a common thing? Am I missing something?