Hope you don't get to the stage where the pain is so bad that you throw up, because man was that an experience I never want to relive ever again. Had 2 stones, first had to be destroyed (sonic blasted or something) since it was too large to pass and we only found out it was there since I pissed blood one day without any pain after walking a few miles. Second stone was the shit that made me throw up.
Kidney stones are also the thing that make me cringe (like in pain) whenever someone says urethra.