WOW! More than I ever wanted to know about Kidney Stones! Seriously though, I am glad you are feeling better. Do whatever you can to reduce or shrink those puppies.
<WARNING, GRAPHIC EXPLANATION>
My brother has had a few bad Kidney Stone episodes, and they went in after one once. He LITERALLY could not even talk about the surgery/procedure and recovery until about 3 weeks afterward. My brother is a BIG 6' 230 pound cop. Having no filter he told me EXACTLY how bad it was... after the actual removal of the stone. It involved a tube that needed to be removed and peeing blood for more than a week. The tube was to make sure everything from where they looked for the stone throughout stayed open and functional while the area healed and where they went in closed and internal swelling went down. And he said he did not want to pee. There was (manly-Of Course) crying involved. But of course he had to drink copious amounts of water... which made him... you got it... pee more. To remove the tube he was expecting the MD to give him some form of pain reliever... shot, pill... and tell him when... you know "1, 2, 3..." it didn't happen that way. The MD was just talking to him and then said, Okay, are you ready? He said Yeah, expecting something else to happen, you know... meds... nurse came over... and they pulled the tube out. My brother said he passed out on the table. More blood for a while but less than in the beginning. But it still took a couple of weeks for clear urine, and he was in extreme pain.
Drink water... take whatever they think will help... avoid them having go and look for them at all cost!