In case someone missed a beat and you weren't told anything, a 3mm stone can cause you a lot of pain, as most stones
can, but can usually pass on its own without the definite need for surgery
to remove it. I'd be drinking water and then drink more water and then more again.. The water will help it pass and help flush it out, so drink as much as you can handle. If you have been given a prescription for Flomax, get it filled and take it too. That will help the stone to pass also.