Stool seems black on wiping like when on iron, l sided pain at times. feel very empty after. maternal cervical and bowel cancer, worried?

Worry if melena: Melena presents as black-colored stool due to the break-down of blood in your stomach. You may be describing this and, if so suspicious, seek immediate medical attention.

Don't worry: I would not worry so much as think it would be wise to be checked. The presence of dark stool would potentially suggest blood loss in the GI tract, which should be evaluated. A simple test of the stool itself can be done to look for the presence of blood.