Severe Stomach Problems. Any suggestions.

I am a 28 year old Male.  I have lost around 90 Pounds in the last 3 years. I have been constantly sick with nasuea and diahrrea since I was a kid. I have had an EGD, Colonscopy, and Endoscope done. Colonscopy showed Possible Celiac and Red stomach. Blood Work supports Diagnosis of Celiac. However, changing Diet did not help.  Gastric Emptying Scan was latest test and showed 23 Minutes where normal range is 50-90.  I was given Librax to help which it helps takes away constant feeling of frequent bowel movements which were causing severe nausea and more diarrhea.  However, I still have problems with upset stomachs a lot.  The Librax just stops the feeling after an initial upset stomach of having to go multiple times which intensified nausea  .  Librax dosage = 2x a day. Also on Pronotix. Tried Bentyl made me horribly ill. Any suggestions?