I'm getting the opinion that a Hiatal Hernia is fairly easy to get and that's the main cause of the Reflux. Mine came most likely from Cigar smoking. I loved cigars, never could tolerate cigarettes much, and smoked 2-3 a day, more if I was driving much. But I always coughed deep and hard from them, The Dr. said that's all it would take. I'm sure Pregnancy is a lot more strain than that.