I have been sick for slightly more than a week now. I have on and off stomach pains that radiate to the upper back around the spinal area which is very uncomfortable. I went to a gastroenterologist 4 days ago and he performed an endoscopy but did not find any problem just an irritation in my stomach lining. He prescribed Nexium and motillium but they only help for a few ours. I also take buscopan for the pain. What could be the cause of that pain?