Hi Sam,
Thank you for your query at DoctorSpring.com
You don't need to worry. You gave a tendency to form small stones in the kidneys and you must have passed off several small stones before unknowingly. A small stone of size 6 mm is unlikely to produce such a severe pain but we will consider that stone as the culprit now . Mostly stones of size 5 mm and less get passed off automatically . We won't be knowing it. Most if the times discovery of a small stone in kidneys is accidental and may not be significant even if found .
It's common for many doctors to give antibiotic like the way you were given ciproflixacin. Try to avoid unnecessary antibiotic intake which us not required for many conditions like this and may be dangerous .
You gave to meet urologist after few days and no hurry . You can go later leisurely. Drink good amount of water and slightly decrease the salt intake.
Let me know if you have other queries,
Regards.

Hello,
What is the best treatment to get off this kidney stone out?
A: The best treatment is always a natural drainage itself. Short of it, either ESL or URSL ( Ureteroscopic Lithotripsy ) can be done. But this small stone doesn't require either

What is the medication name for kidney stone pain if get any in future?
Tab Hyoscine ( Trade name - buscopan etc) can be used whenever it is necessary.

Is it possible to a 6 mm stone to pass?
Yes. though, theoretically, only the stones of 5 mm and below can be passed off naturally, the size can vary as per the observation made by the radiologist and shape also determines. So you don't need to worry about the stone.

What do your think if I take Renavive 'Natural Kidney Cleanse'?
There is nothing like natural cleansing agent for the kidney. Most of these remedies are fake and can damage both the liver and kidney. Better not to resort to such artificial and fake remedies.
Feel free to discuss further,
Regards.