So ebf DS is 15 weeks and has started fussing, pulling away and arching his back at every feed the last few days. Thing is, he yanks his head back while still attached, and my poor stretched-out nips are getting sore! 
It used to happen occasionally on the right (less productive) boob and I could calm him down with white noise and/or expressing some milk onto the nipple to encourage him and/or rugby ball position, but lately it's on both sides and the old tricks aren't working so well. He starts it right from the beginning of a feed, but it can pop up again after he's drunk a bit. It's the same pattern every time - latches ok, a few sucks, arches back with a wail and nipple pulls painfully out of his mouth, repeat...
Any suggestions for what I might do? Is it a phase that will pass soon or could it be silent reflux (how can I tell?). I'm starting to dread feeds - I was sore enough yesterday after half an hour of this where he drank sfa that I had to pump and feed him instead 