My 12 week old son does this too, pretty often. We've been sticking to a nighttime routine with him - bath, pjs, nursing, rocking, bedtime. He is always happy as a clam during the bath, but usually towards the end of getting his pjs on he gets cranky, and then it carries over into nursing. Sometimes, I get up and take him into another room and he'll nurse better there. Sometimes I take him off the breast and rock him for a bit to calm down, then we try again. Sometimes switching sides helps.
I don't know what causes it, but we're dealing with it, too. I think maybe, like you said, it's his way of "letting off steam," like he's just overstimulated from the day. In our case, anyway, I tend to think that it's less related to nursing than to his general mood at bedtime...
I don't know what causes it, but we're dealing with it, too. I think maybe, like you said, it's his way of "letting off steam," like he's just overstimulated from the day. In our case, anyway, I tend to think that it's less related to nursing than to his general mood at bedtime...