I would say yes, it is possible.

Cipro and the other fluoroquinolones can cause tendon ruptures within that time frame easily. In fact they were doing this for a long time before the ruptures were linked to the drugs. As the story goes, it was doctors who used samples given to them by drug reps, who developed the ruptures first and figured out it was the drugs and a delayed reaction.

Warning Signs of Fluoroquinolone Toxicity | Floxie Hope

The fluoroquinolones disrupt DNA of cells, so this damage may take some time to manifest. Some people may be more sensitive than others, and therefore get the problems at different times.

Some have immediate effects, mostly CNS brain effects. In fact high doses are known to affect the elderly rather quickly. Seizures, confusion etc.

It is also possible that your effects are additive. You may have been exposed to another trigger, since there are so many causes of PN.

Some of the reports on the net say this damage is permanent. But some doctors are telling patients that perhaps there can be healing changes in 2 yrs or so. I think that this is pretty sketchy and variable.