I have recently been expirencing the same thing you are, exept not as bad. But I know the pain. You could try taking some Gas-X or Beno to help relieve some of the pressure that could be caused by gas; thats what I do, it helps. Also drink tons and tons of water to held flush out all the backed up stuff, and flush you out. And try exerciseing, when you move around and work your body alot it helps to make your bowels move more frequently. Plus when you have to go you go right then and dont hold it, or it will harded and become more backed up causing more pain. Lastly try eating healthier foods that are high in fiber, it helps for easier bowel movements. Hope this helps and wish you the best of luck! :)
Fortunately, I did get some relief after taking three bottles of Magnesium Citrate. Now, I'm suffering with hernia. Pain is worse at night in my chest but lasts only about two hours. Not eating late, etc. to help condition. Didn't get any comments on bowel backup. Just hope and pray you don't experience it. This was excruciating!!!!!