He keeps choking :(

Sara

This isnt a breast feeding question but my baby is 8 days old and he randomly started choking on his bottle. At every feeding today he would to the point where it sounded like he couldnt breathe :( ive been using the same bottle since i brought him home and its been fine until now. Its slow flow. It doesnt even come out until you suck on it. Ive tried sitting him up/laying him back more, warming up the water and keeping it room temperature. The hole hasnt gotten bigger either. Idk what to do :(