Hello,
You seem to be suffering from Pseudomembranous colitis which is overgrowth of Clostridium difficile bacteria caused by antibiotic
usage. The symptoms of this condition are abdominal cramps, blood in stools, fever, watery diarrhea etc. The symptoms usually subside after the antibiotic or other medicine causing the condition is stopped. Metronidazole is usually used to treat the disorder and for diarrhea electrolyte solution may be given. Consult a doctor for more queries and assistance.