Weird Symptoms with Kidney Stones?

[StonesNoMore]

A year and a half ago I woke up in the middle of the night with awful flank pain. I went to the ER and based on traces of blood in my urine, frequent urge to urinate and pain, they diagnosed me with a kidney stone. Fast forward to a few weeks ago. I started having a dull ache in my side, same side as last time. I assumed I pulled a muscle but the pain just would not go away. A few weeks after the ache started, I noticed that whenever I urinated it did not burn/minimal urgency, but rather felt like cramping in my lower abdomen. It would subside shortly after urinating. I went to a urologist who took urine and said no UTI/no blood. Sent me for CT scan and said I do have a small stone near the bottom of my right kidney ( he did my whole abdomen and pelvis and thats all that showed). My question is why did I feel cramping upon urinating when the stone has not descended? Is it possible I had passed another small stone so that's why? I swear I feel pain when the stone moves within my kidney. Could this happen?? Thanks!