Gas pains, stomach cramps, black specks in stool?

Melenic stool?: Dark-colored stools may result from iron supplements, foods you eat (like a lot of spinach), substances (like peptobismol), but most significantly suggests bleeding. When blood is denatured by acid in your stomach, as from ulcers, stools will turn tarry ("melena"). Blood may also be ingested from nose bleeds, bleeding gums... Persistent melena (without obvious cause) & symptoms warrants md visit.

Could be ulcer: See gastroenterologist or your pcp. You may have gastritis, ulcer or polyp. If left untreated severe anemia, cancer, perforation could happen. Do not delay.