This is a complicated issue (obstruction of the ureter at the junction w/ kidney) - not sure anyone here can help, unless a medical professional can weigh in. If it were me, I’d just call the Dr or Uro & ask about pain relief in the meantime. Maybe they could prescribe smthg stronger for pain if the Ibuprofen is not helping enough. Obviously it should be a Med that wouldn’t cause the situation to get worse. Best of luck to you, hope you can get this taken care of ASAP...