Hi, thanks for using health care magic
Kidney stones less than 5mm tend to pass within 4 weeks of the onset of symptoms. The use of a lot of water would aid in the passage of the stones, you should try and consume at least 8 glasses a day.
Kidney stones would cause chronic kidney disease
if they are large and obstruct the flow of urine for a prolonged period of time. A 3mm , your stones are small but if you remain concerned you can consider having blood tests which can assess the function of your kidneys- this would be a creatinine
blood test along with an estimation of glomerular filtration rate.
The glomerular filtration rate provides information on how the kidneys are filtering.
I hope this helps