At the onset of my anxiety and depression I experienced the first of many bouts with GERD. It was as if the two came joined at the hip. I took what they were giving at the time (1977), huge Tagamet Cimetidine pills. At that time I was taking Sinequan (Doxepin) for the anxiety and depression. The gagging, what my physician called "Globus Histericus," itself had nothing to do with the GERD. The two symptoms didn't occur simultaneously. With Effexor came the end of the GERD, for me. The gagging, I seem to have for life, preceded by a huge jab in my throat.
Have you made an appointment with a gastroenterologist? Please let me know how you feel. *ME*