I think I've made my nearly five week old baby lazy at latching as I've let him constantly use my boob for comfort and not been bothering to change his position if he's about to fall asleep (for fear he won't sleep - desperate for him to go to sleep!) So he ends up rolling nipple round/sucking on it for ages and ages after a feed. He often won't open mouth really wide for a feed now - even though I tease his lower lip. Any suggestions? I'm making my nipples sore and am fed up.