As I know too well. Stones may take a while to grow, without any symptoms until they start to move, so it can be difficult to identify the cause. Regardless, it's definitely wise to avoid dehydration at all times. Also rhubarb
For emergency self-medication for the pain you can take the maximum dose of both paracetamol/acetaminophen and ibuprofen simultaneously (so long as you are OK with either of these on its own, of course.) If compounds with added codeine (e.g. co-codamol) are legal where you are, that helps too, but I wouldn't risk carrying anything containing codeine when travelling. A doctor may have more potent options available.
I wouldn't be without it when travelling, just in case. But be careful what you drink while taking cipro... unlike some antibiotics, alcohol is no problem, but milky drinks stop it working and it potentiates caffeine to the point where you can feel quite ill after a single cup of tea.