What Causes Different Kind Of Stools Without Any Abdominal Discomfort?

Hi, I have abdominal pain with different types of bowel movements - none of them good. sometimes nothing but yellow flaky stuff comes out with mucus and blood present. Sometimes small brown pieces, sometimes just crumbs. A couple times after eating, it was dark black slime that appears to have worm like things in it. There is a small amount of blood present almost every time. However no nausea, vomiting, loss of appetite, flu symptoms, fever, weakness, fatigue or anything else. This has been going on for 5 days with no sign of improvement. Any thoughts? Thank you