chef had them before but i am unsure what his situation was.
anyway my mom has these every once and a while and they are certianly not fun at all. the main thing that matters here is the size of the stone. pretty much the bigger the stone is the worse it is going to be (sometimes if it is large enough, an operation is needed). i would wager since you are young it is probably not very big. also i would maybe keep the stone once it's passed and get it analyzed (by a doctor) in case this is an indicator of something else. typically kidney stones are made of calcium, but if it's not, it could suggest other problems with your body. i don't have any tips for dealing with them since i never had one, but i am pretty sure you can't really do anything other than pasing it.