I haven't had any problems bfing DS (DC3) but suddenly since yesterday evening we've been really struggling. He starts as normal and then within seconds he gets very upset very suddenly. The sort of crying they do when something hurts and they're a bit shocked by it (like when they do the jabs). I thought he needed burping but I keep trying and either he doesn't burp at all or it doesn't improve after he does. He calms down very quickly if I give him a dummy but as soon as I put him back on the breast he gets very upset again until I finally give up. What can I do? He had a very green nappy today which I guess it means he's not feeding long enough to get to the creamy bit.