Sever Hypochondriac, had cancer numerous times... Been experiencing abdominal pain lately, lower left side mostly, of course in convinced its either Colon Pancreatic or Bile Duct Cancer, I'm only 20 years old, male. Loose stools either dark brown or light brown depending on the day. I've never been diagnosed with IBS but I cannot eat greasy food or its bad news, but I've never actually had pain like I've been experiencing lately.