My 6 week old son is often pulling away from my breast, arching his back, groaning and being generally unsettled when being breastfed. He just doesn't seem to be enjoying the feed, and it's definitely stressing me out a lot as I'm struggling too. He's also gulping air to the point of crying and I have to take breaks to burp him. This happens both at the beginning of the feed and when the breast is almost empty. He's been gaining weight and is generally well, however, breastfeeding doesn't seem to be enjoyable to him (not always but quite often). Do you know what might be causing this sort of behavior and how to manage it? Thanks