Black stool

Hi iam not being smart , but ill give you all the reasons this might happen , then go see your doctor,
1. Abdominal Cancer
2. Acinic cell carcinoma
3. Adenocarcinoid tumor
4. Cirrhosis of the liver
5. Colorectal cancer
6. Diverticular Disease
7. Duodenal ulcer due to antral G-cell hyperfunction
8. Esophageal varices
9. Gastric Ulcer
10. Gastric erosion
11. Gastritis
12. Gastrointestinal Stromal Tumors
13. Gastrointestinal bleeding
14. Gastrointestinal neoplasm
15. Hemorrhagic proctocolitis
16. Hookworm
17. Korovnikov syndrome
18. Peptic Ulcer
19. Plexosarcoma
20. Portal hypertension
21. Rectal bleeding
22. Rectosigmoid neoplasm
23. Small Intestine Cancer
24. Small intestine cancer, adult
25. Spira syndrome
26. Stomach bleeding
27. Stomach cancer
28. Thrombocytopenia
29. Variceal Bleeding