In so much pain and no relief - help

I have been living with acid reflux for over three years. I have been to doctor after doctor. I have had 2 endoscopies, Bravo PH probe (Demeester score 60.2). I was diagnosed with chronic GERD, esophagitis and hiatal hernia. I have taken every medication possible with no relief of symptoms. My chest (sturnum) hurts so bad at times I cannot catch my breath. My doctor just keeps perscribing medication that does not work or gives me bad side-effects. I have taken Nexium, zantac (ranitidine), prilosec, prevacid, protonix, reglan, carafate, axid, Aciphex, zegerid and I consume about 20 - 40 tums per day. I am still in pain and they are not helping me. How do I get my doctor to listen to me? I feel like I am bothering him every two weeks. Every time I see him he perscribes me different combinations of the same drugs and they do not work. What can I do?

02/09/08 = I was scheduled to have Lap. Nissen fundoplication done on March 5th. I just found out that the Manometry machine is broken and will not be fixed until the first or second week of March. Now, I have to re-schedule my surgery because I have to have this test before the operation.

I have been vomitting intermittently through out the day and my pain is severe. I am at my last rope.

I will update further when I have more information. Thank you to everyone that commented - You have been so helpful through my ordeal.

02/15/08: I had completed my 4th endoscopy yesterday. I have graduated to stage 3 esophagitis and had to have biopsies on the lesion tissue.

Mysurgery has been set for April 9th (I cannot wait).