Baby bad reflux

Ayesha • Married since 25/4/2014.. 1st daughter Maria 4/10/2016
My baby has a really bad reflux that she would wake up from her sleep or she would choke on it.. Any mama out there has the same problem and how she solved it... We tried everything.. Burping after each feed, putting her up for an hour up right, changed the milk, literally did everything, even the dr prescribed zantac and its not working