It quite possibly could be a parasite. ALL animals carry parasites; humans are animals; therefore, humans have parasites too. It's just a fact of nature. 70% of parasites are microscopic and 30% are of the visible variety - like maybe what you saw. Most people never look at their stool. Many of our customers discover they have parasites when they have a stomach virus or when they do a Colon Cleanse or, like in your case, when strong laxatives are taken. With so much action going on down there, a visible parasite or two just gets knocked loose! A good herbal parasite cleanse should fix you right up. Good Luck!