Stomach issues

Stomach issues with constant bloating and diarrhea. Been back and fourth to the doctor. Ran test after test. Have not been able to figure out what foods trigger, as I track them ones I thought where safe end up triggering flare ups. My stomach always feels uncomfortable and bloats often. I have had colonoscopy’s, ct scans. Been on a strict regimen of pre/pro biotics. Just trying to see if you could possibly give some insight.