My 3 1/2 month old gets stressed on the breast if I try to feed him sitting up. I know i have a fast letdown so have adapted by feeding lying down, so he can escape the excess milk when it comes! But I think he feels trapped when I'm holding him sitting up. This makes feeding him out and about really difficult, and he usually ends up screaming as I keep trying. I can take him off when the letdown comes but he screams and wriggles as soon as I try to get him to lie back against my arm again to feed. I don't know what to do. I feel like I need someone to help me hold him right, or tips for how to do it? Thanks...