Talk to Gastroenterologist on Loose Stools Vomiting White Tongue

I m suffering from 2 years of chronic loose stools 3 to 4 times a day stools like brown and loose. Vomiting that often 3 times in a week. Nausea daily. Lost of appetite weight lost. White coated tongue. I m suffering these diseases since 2 years. All medical tests cbc lft hepatitis etc stool culture stool for calprotectin stool examination urine examination etc TSH anti ttg igg even those tests which i never heard are normal. I final diagnosed IBS i m on librax. rifaxa sr 30 cap. from this medicine i hve no vomit no nausea increase appetite. But loose stools are still occurs.