Baby chokes on breastmilk every once in awhile

Jenny
So my baby has some reflux issues so she tends to spit up a lot. The doctor doesn't want to put her on medicine since she said it will go away once she's older. It doesn't help that I have oversupply and a forceful letdown. She sometimes will even choke which scares me everytime because she turns red and stops breathing. Everytime she does this I sit her up and try getting her to breathe while she gasps for air. Usually it is so bad that she will throw up all her food and that's when she will start breathing. I try to make her slow down so she doesn't choke so much but it's hard she eats way too quickly. Plus after she throws up she gets very upset and falls asleep. Does anyone else have this problem?