I have a question about my poop. Half of each stool came out completely black, and had some type of texture to it (almost fuzzy) that was very odd. I have never produced stools like this in my life. Last week, I was very constipated but today, all of the sudden, I have pooped three times in six hours. I am a 20 year old female. Do I need to seek immediate medical attention? I am very worried.