I ma a little worried. By 10 week old used to take about 40-45 mins to feed, but today he has been feeding only for 10-15 mins. He refuses to remain at the breast after that, and starts crying if I try to latch him back on. Is he getting enough milk? Is he just getting more efficient at feeding? He is still passing stool after every feed, almost immediately after the feed and seems quite happy after that, though keep sucking his fingers