About 5 weeks ago I got watery diarrhea for one day. I had to keep going to the bathroom and I think I had a fever, and I had chills. There was a bug going around the house. The next day I felt better. We went on vacation and I didn't notice any problems with diarrhea. The following week the diarrhea started a couple of times a day after I ate. It was soft, or watery and sometimes it was small but formed. There were pellet like stools. I didn't feel an urgency to go just a little cramping to let me know I had to go. It was only about 2-3 times a day. Sometimes it would be brown, light brown and sometimes a fluffy yellowish with undigested food in it. It also was green with undigested lettuce. I really had no pain just minor cramps. I had no blood or mucus. Once when the diarrhea was very soft it looked to me like little bits of rice or sesame seed size white things. I don't have very much gas. I haven't loss weight or lost my apatite and haven't felt nauseas. I am not tired and it hasn't interfered with my work day. I am taking priobotics and yogurt. Previously I was not eating good at all. A lot of fast food, milkshakes and the like. I am now trying to eat a healthier diet. I do take a lot of medicine for BP, Irregular heart beat, blood thinner. I am almost 69 years old patientold. I have an appointment with my GP on Friday and I have also scheduled a colonoscopy which is in September. Does this sound like it could be colon cancer, or IBS or a parasite infection?