Hello moms, who's on the breastfeeding question, how do I be my daught…

Hello moms, who's on the breastfeeding question, how do I be my daughter constantly asks for breast all the time and looking for it wants to suckle but at the same time she throws up too even when wearing a pacifier, coughs and after a couple of minutes she asks again ? I can't give it and giving it is scary, what should I do? She takes a suckle but starts crying ?