Hi, im a 26 year old female and I was having mucus in my stool that was varying from quite a lot to a little bit with pains when I eat and back pain that would come and go and I felt like I could never fully empty my bowel, so I went to the doctors and she examined me said there's nothing up my back package all completely normal but sent off for a stool sample called Faecal calprotectin to check for inflammation, the stool sample came back normal so I felt relieved. I no longer get pains when I eat and the back pain is a lot better. I eat a lot of Weetabix because I enjoy it and sometimes eat 3 bowls a day instead of meals which I know is bad but I struggle with an eating disorder and the Weetabix are low in calories and contain a lot of fibre which I thought would help my bowels. I took a laxative last night and the 3 poops I have had since have been very dark brown with a little mucus and they seem quite hard but not solid. I suffer with extreme health anxiety and now I am worried that the colour of my stool im now having could be caused by old blood coming from my bowel. Does anyone know if Faecal calprotectin stool samples would detect bowel cancer? I am really worried and feel like the doctor could of missed something or that the tests are not accurate. Please can someone help me I feel like I'm losing my mind I am constantly analysing my poop to the point I will put gloves on and inspect it with a torch light it was the colour of dark chocolate with some parts lighter brown