I have had multiple blood tests all coming back normal (except for elevated white blood cells), and stool samples coming back normal, but still suffer from frequent mushy bowel movements that always have a good amount of mucus in them. There are these little white balls that are in every movement as well. I suffer from nausea, frequently after meals, weight loss, loss of appetite, and sever headaches. I have been tested for parasites too but this also comes back negative. I guess I have IBS since I fluctuate back and forth from normal stools to diarrhea. I go into more depth in another post, http://www.medhelp.org/posts/Gastroenterology/Small-White-Balls-In-Stool/show/1464053 , but I feel that there is more to these little white balls.