I am 17 years old. i think i passed a kidney or bladder stone once in my urine (no pain). i have not noticed any other symptoms or pain and have had normal urine for 1-2 weeks. would you still advise seeing a doctor? is this typically serious?

I think I answered the previous question. No, you do not need to see any doctor at this time. There is no confirmed diagnosis. However, if it recurs, pick and keep that possible stone then visit the doctor by then. Just remember this event for now. In the future if doctor or nurse asks you about history of bladder or kidney stone you can tell your story by then.

You either passed a stone or did not. If you did not see one you probably did not. Stones are rare at your age. But if you are worried see your doctor and get a urinalysis and any other tests he/she orders.