I Have Had Guy Problems For Last Few Years. Left

I have had guy problems for last few years. Left side pain, intolerance to foods casing diarrhea, gas bloting. I was treted at one stage when it got worse for a stomach parastie. At the time the medication made it alot better. Since then its all come back and im still intolerant to most foods. I went on flagyll for a week and ive gotten worse. Now my stomach hurts, i have more hwart burn, and i have what feels like uncomdortable period pain? Wet smelly farts and stinky poos.