question: i went to the ER in october with  pain in my right side. they did a CT scan nd told me i have a 3mm kidney stone in my right kidney in the lower pole calyx. i have not had any pain since tht day. the pain wasnt even tht bad then for a stone to have passed. i had a stone 10 years ago so i know the pain i should be going through. but i havent had any pain yet. so my question is why hasnt it passed yet whats taking so long.