Maybe it is a C. diff infection: they often follow a course of antibiotics. A nurse told me the telltale sign of this infection is a stool that looks something like beef consomme. :/ Low-grade fever and diarrhea are also consistent as far as I know. Ask your doc to get a lab test if he doesn't suggest it first. I hope you get some relief soon.
Edit:
this site says Cipro is occasionally associated with C. diff infections.