Brief Answer:
please get at least a minimal workup done
Detailed Answer:
Hi,
What you have described is a fairly common condition where patients do pass stones without any significant symptoms.
However you should realize that you are likely to padd stones lesser than 6mm easily while you could be harbouring larger stones in the kidneys which could cause severw paon in the future eith obstruction ot worse be silently damaging the kidney.
I suggest you get at least a complete blood picture, a complete urine analysis, serum creatinine, uric acid, calcium and phosphorus estimation done. An ultrasound and plain X-ray of the KUB region should be done and if there are indeed stones larger than 5mm in the kidneys, you should get actively treated. A non-contrast CT scan of KUB region may be required
I hope I have been of help.
Regards.