I have developed food intolerance from last few years , when i got intolerance test done I found out that I'm intolerant (not allergic) to wheat , milk , casein protein found in milk , yeast etc , whenever I eat these food while traveling or other situation, I feel bloated heavily and there is lot of formation of gas and stomach cramps , I feel constipated few days , In past I had  endoscopy and colonoscopy done and doctor had told there is no problem but symptoms persist, I don't know if it's ibs or sibo or poor digestive enzymes or other thing confused , can anyone provide insight or help in this matter