ds is 7 weeks and has been fussing on the breast after about 4 or 5 minutes (normally feeds for around 8 minutes). i've been offering the second breast and that satisfies him for a similar length of time - previously though he only ever needed one breast per feed. have just tried expressing after a feed to see how much milk was left and practically nothing came out. surely i should have more milk available than that? i don't think it's a growth spurt, as he's still only feeding every 3 hours, as has always been the case. is there anything i should be doing to increase supply?