My ds is three and half weeks old and normally feeds (vigorously!) for 20 minute stints, resulting in a certain amount of spit up but a contented baby.
Then last night (not for the first time but not regular occurence either) he was very grizzly in the evening, cluster fed a couple of times and was still unhappy. Finally he had a big feed at 10ish. He seemed ravenous and if he lost the nipple, got furious. He fed for twice as long as usual but then for the next two hours kept spitting up again and again and was still unsettled.
It seems that if he feeds a lot, most of it comes back up again. I don't know what to do for the best - instinctively I want to let him feed but can you overfeed? Sometimes I hate the fact that I don't know what I am doing (usually at 1am when I can't ask anyone)