43 year old female. 5 7 120 lbs. 1 pack a day smoker, moderate alcohol intake. 2 years chronic diarhea with very foul smelling fecal matter. Loud stomach sounds. No pain. Stool tested negative for parasites, negative for malabsorption and negative for celiac. Yesterday, a weird floating sac was in the water. Medications include Wellbutrin, Xanax, and probiotic. I just cannot get my stomach regulated. Do not feel lethargic or sick - except for diarrhea 20 minutes after every meal.