Constant upper abdominal pain

I have Short Bowel Syndrome. I am having constant abdominal pain above my belly button and to the left of my abdomen and I also have constant nausea. Doctors don't know how to treat my constant abdominal pain and constant nausea. Abdominal pain doesn't change with what I eat, doesn't change with bowel movements and doesn't change with moving around/walking etc. Resting doesn't change my constant abdominal pain and constant nausea.