My six week old daughter has acid reflux.  My peditrician prescribed her  Zantac but she does not seem to be doing better.  She is a cat napper, is fussy, constantly has the hiccups, appears constipated, pulls away from her bottle at times, wheezes, coughs, and periodically shouts in pain when sleeping.  My baby does not spit up nor vomits. She is formula feed.  The big issue is she constantly chokes.  Initially it was so bad where we had to blow on her face in order to get her to breathe again.  Her choking episodes occur sporadically throughout the day.  Not necessarily after feedings.  She can be sleeping and she will appear she is grasping for air and choking.  I am very frustrated as she needs to be monitored closely.  I am worried as I eventually I have to return to work. I have also tried switching formulas.  My peditriacian ordered a G.I. test which came back normal.  Has anyone experienced this before with their infant child? Any suggestions or advice? Please help!