Sorry about your woes. I don't know much about Ayurvedic cure for gastritis, but if you have enlarged liver, the following site has some advice. I am not sure that the Liver Flush is for everybody. Sounds like it harmed you a bit. I'd stay away from them. Maybe go back on the pills the Ayurvedic doctor gave you and see what happens down the line. Good luck.
I did several, maybe 2 dozen, flushes over a few years and had no bad side effects like you. I did discharge some genuine stones and then they stopped coming. I do not feel that my overall health is much improved but nevertheless it was good to get rid of that stuff in my gallbladder/liver.