On Friday, 6/8 I had a 5mm kidney stone removed from my ureter. The surgeon used a stent for the procedure. I was informed that a string would protrude from my urethra and be used to pull out the stent a week later. When I returned home I could find no sign of the string. Late saturday I began to experience pain in the kidney area similar to the pain I had prior to removal of the stone. The pain was accompanied by a pressure sensation in the groin area and below my rib cage. It is now Sunday morning. The kidney area pain has subsided but my urine this morning was a very dark brown color. I am wondering if urine is continuing to back-up thus causing the feeling of pressure. I am also concerned that the dark urine is caused by bleeding somewhere. My doctor is a sole practitioner and on vacation 'till next Friday. Any information on this condition would be appreciated.