For the past week I've been having diarrhea with a lot of blood in it. Today it's been mostly gas/and like pooping out pure blood no diarrhea. I went to the doctor and he said I'm most likely fine, and if it persists then I need to go to a gastro doctor. A few days before I felt like this (all the diarrhea), I hadn't been pooping like at all. It was like a tiny bit, and it was mostly bloody mucus (I guess that's what it was). I thought it was just an irritation/stomach bug but it's gotten worse and I'm getting worried. Has anyone had this before? Did you ever find out what it was? Is it dangerous? I'm only 16 so it's probably not colon cancer, but I'm still scared.