Hi. I Was Recently Diagnosed With Severe Anemia And Had

Hi. I was recently diagnosed with severe anemia and had endoscopy that showed possible previous bleeding ulcers but not certain. Showing evidence od Celiac that biopsy and blood test confirmed. GI dr said no colonoscopy needed. Today saw hemotologist and he asked me tbree times if I was sure they didn't find con cancer. Now I am worried he saw something different that GI dr did not see. How worried shod I be?