I have to go to a gi doctor because I have GERD , esophageal stricture spasms, and esophageal erosion. They said what I have can cause esophageal cancer . When I stand-up I get dizzy, and my vision goes too bright and dark to see. I am getting an ear ache in my left ear pain in my uperback rib area, troubles swallowing , I get really bad headaches, pressure feeling in my head and jaw, chest pains, and when I use the bathroom my stool is really dark looking not lime usual.