My 4 month old boy has been fussing at the breast for a few days now and screams in pain, arches his back and pulls away, sometimes refusing to feed at all. He seems really hungry though. He is occasionally waking at night screaming and hard to settle especially during the day, but at other times he is in great form which makes me doubt he's actaully ill. He does seem particularly windy at the moment. Today I have a sharp pain in my left breast - could we have thrush, does anyone have experience of this? or any suggestions what else might be bothering my son after months of succesful happy breastfeeding?! thanks