Rocket,
It seems like the doc is really throwing a lot at you at once. To go from just Xifaxan to Cipro/Flagyl/Canasa. If it were me, I would just start with the Cipro and see what happens. People do respond well to the Cipro/Flagyl combo, but I thought that was only needed if one didn't work on it's one. Hope you start feeling better soon!!