I have had constant Diarrhea, gas and bloating for 2 months. Floating, greasy type small stools all day. I stopped eating sugar, coffee, gluten and dairy. Dr tested me for everything including parasites. All blood, urine and stool tests were normal or negative. Terrible fatigue. Dr started me on flagyl to see if it works before more intensive stool tests. no blood in stool or cramping. Dull slight pain in lower left side occasionally. I am also on probiotics. Very perplexed. No weight loss even though i tend to run to a bathroom after I eat. Plenty of fluid intake during the day. Any suggestions?