i have been diagnosed with gerd and i recently had an endoscopy done which concluded that i have a healing ulcer in which i found out by a picture on the paper i received after the procedure. I am worried because the doctor has not spoken to me after the endoscopy to explain this to me.I have been on 40g nexium twice a day for 2 months. After the 1st month i was okay but now i am experiencing sever heartburn, gas, acid, rumbling in my stomach, 
and diarrhea. My heartburn is not when i take food it is all day and all night. Please does anyone have any explanation , similarity or knowledge of this? 