I was chewing ice, a lot! This was new for me. My MD said it could be because of anemia, so gave me a blood test. Yup, I had anemia. He wanted to know where my blood was going, so suggested a colonoscopy. Yeah. Not thrilled; but I said, OK. It came back positive for rectal cancer. Had radiation, chemotherapy, 3 surgeries over next 18 months. Permanent colostomy now. But I’m alive! It’s been 4+years now. ALWAYS say, “yes” to tests your MD wants to run, especially the dreaded colonoscopy! (which, by the way, isn’t that bad because you’re unconscious for it)