choking?

Cherakee

so when I feed my baby she eats about 2 oz at a time, she will make this noise like she is choking. it happens almost every time. I've tried putting her in different positions when she eats and everything but she always do it and it scares the heck out of me. does anyone know why this might happen or what I can do to stop it? she gives me mini panic attacks every time and I hate it.