Ouch !!! I feel your pain .. I have had eight kidney stones always seem to come on a Friday before a Saturday race day.. a little humor for you : years ago I came home very early on a Saturday morning from the hospital very heavily medicated for the pain of the stone .. the phone rang and I picked up the lamp trying to answer it .. I told my wife .. time to go racing ! then she reminded me of the lamp incident .. maybe its best if you skip racing today she said !! .... hope you can pass the stone and get out racing !!