When your baby is having trouble managing your flow, they will often cry in protest. The milk may be coming out so quickly and abundantly — sometimes spraying down their throat — and they may not be able to coordinate breathing and suckling, which can make them quite upset.
Also, why does my baby pull away and cry while breastfeeding?
Some babies pull off the breast crying due a fast or slow flow of breastmilk. If your baby pulls off your breast soon after your let-down (when milk begins to flow from your breast) and is coughing or gagging, you may have an overactive let-down reflex.
Also know, why do I have a let down when my baby cries?
Since your brain is wired to care for a newborn, other things may trigger the let down reflex. If your baby cries, or if you hear any baby cry, your milk may let down in response. If you go too long without nursing and your breasts get too full, your let down reflex may trigger to relieve the pressure.