This is a little gruesome. But I'm a 15 year old female and I'm suffering from worrying symptoms of bowel cancer. My stool (poo) is a light brown colour with black lumps in it, there was blood in the water aswell like the start of my menstrual cycle but I'm no where near due on and I'm always on time anyway. My stool was very soft as well. I have also been having very bad stomach cramps and occasionally bad gas from the down below region. This is very abnormal and have never experienced it before. This has only happend recently so not wanting to rush to the doctors and waste there time. Please help I'm worried