My poop was black this morning and last night i had really bad pain in my stomach and the pain is back. its in the middle and i am hunched over?

Possible ulcer: Unless you have been taking peptobismol or iron therapy these symptoms suggest upper gastrointestinal bleeding you should seek help right away. It may be something all possibilities need evaluation

NOT good if melena: 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. Stop any nsaid's you're taking, & call your doctor right away 4 evaluation