This forum is three years old but RE: Post ERCP complications

In 2009 I finally had the back pain, upper right quadrant checked. Common bile duct (CBD) was narrowed, so they placed a stent.  I awoke projectile pea green soup and horrible pain. Much like labor. Still in the hospital five days later I convinced them to do a CT scan. Perforated CBD; air in the front. This was after they had given me carbonated drinks-which started even more pain and then some type of carbonated laxative which made me severely ill. Next day went into surgery (general surgeon) he said  to repair my dangerous perforation and to remove my gallbladder; that surgeon said  that I should have had my putrid gallbladder out 3 1/2 years before and now he is saying that he didn't want to disturb the perforation since it is healing. In the hospital 2 weeks.
About 4 months later I went in to have the stent removed but the stent had migrated.  They assumed out. But since that time I am still having major weight loss,diarrhea, nausea and vomiting.
I have Fibromyalgia- but it is not as bad if I stay away from anything with High Fructose Corn Syrup (HFC) aka Corn Sugar, and also stay away from Corn Syrup.  It isn't the corn we grew up on and HFC cannot be processed so you get belly fat. So I know I have lost weight from that but what test do I need to see if the stent screwed something up?