Suggest Treatment For Sever Acidity And Headaches

I am 32 year old male. I have acidity problem from a long time. I started taking Rantac 150mg about couple of years. I continued to take Rantac for couple of years, it was under control. I then consulted a Gastroenterologist in bangalore who did the endoscopy and mentioned there is nothing wrong in the report but to stop the medicines. If i stop the medicine i have severe acidity problem and headache on the right side of my head which affects my daily work. Is there a solution for this?