I have low bilirubin, low AST, low iron and high magnesium level and I am wanting to know what would cause these problems. I had a ovarian tumor removed above 5 years ago it had grown up into my stomach, causing me to be cut all the way above my belly button, my surgeon said it was the size of a basketball, it was not cancerous. Since that time I have had problems with my stomach and have been diagnosed with GERD, I have stomach pain, burning, bloating, constipation everyday, along with weakness, fatigue and back pain . Can you help me figure out what is going on with my body.