Hi. I had gone through your history. I understand your concern .Actually,the correct treatment we can prescribe when we know diagnosis. We should find cause of diarrhea,it is dysbiosis caused by pathogenic flora. For confirmation of diagnosis I suggest stool culture for flora and sensitivity to antibiotics,stool analysis,stool for cyst and ova,blood test,Igg to G.lambialis. I usually prescribe antibiotics or bacteriophag according to results,enzymes syrup,probiotics for 1-2 months for normal flora. Give analysis ,then let s me know results.