According to the symptoms you describe (constipation/diarrhea, fatigue, headache, blood and mucus in the feces, abdominal cramps, slight fever, heartburn, nausea) you might be experiencing severe colon inflammation (colitis). Colitis can be caused by bacterial infection (Schigela or Clostridium deficiele, for example) or it can have an unknown cause (like in cases of ulcerative colitis or Crohn’s disease). Schigela causes a severe disease called dysentery. Infective colitis can be diagnosed microbiologically (isolation of the bacterium in the feces) and serologically (finding antibodies in the blood). Ulcerative colitis and Crohn’s disease are probably autoimmune diseases and they can be confirmed only with a colonoscopy and a biopsy.


Colon cancer, although less possible, might be excluded. It can be excluded or confirmed only with a colonoscopy and a biopsy.


You need medical help from a gastro intestinal internist and an infectologist.