I ripped the headliner in my wife's (then girlfriend) car years ago.
Woke up and had a back pain...no, was it my appendix? no it's my back....just couldn't place the pain. Then I couldn't Pi$$....."Damn what's going on?"
Go to a computer show and collapse from the wave intense pain. Wife runs to get the car and people are looking at me like I'm a freak. Thanks for helping people.
Get to ER and go from inteveneous Saline to Codiene to Vicodin to Morphine
. Nurse says worse than giving birth (which must feel like $hitting a cinder block...ouch!).
Days later Urologist asks how long I was in the hopital. I say less than one day....left that night. "Really? They should have admitted you because your kidney ruptured"..... Yikes. Apparently your kidneys have pressure valves that blow out when the liquid has no where to go.
My BB sized/shaped stone was analysed and said to be created by calcium. I was told to drink plenty of water and try to minimize calcium rich foods. According to doc when young the urinary tract is inflexible and even a small stone can bring you down. As you get older you lossen up.
Good luck and get that stone analysed. I'm sure you'll be fine.