I Have Been Experiencing Diarrhea After Eating For The Past

I have been experiencing diarrhea after eating for the past 5 months....I have had an endoscopy and colonoscopy....negative results....stool samples collected in 3 different collection tubes....negative results....and a breath test and I haven't received results yet.

Drs. have tried several different prescriptions to no avail...I have tried homeopathic methods....no help.....

I am at a loss ...