I have been having severe stomach pain all the time no matter what I eat or drink and the pain is so bad that it is now in the middle of my back. The pain brings me to my knees. I have tried vicadin for the pain but it is not working and have tried milk products to coat my stomach but it only helps for about 2 seconds and then the pain returns.

Have you seen a Physician? This sounds serious - but it's both dangerous and foolish to diagnose over the Internet.