Suggest Treatment For Severe Flank Pain While Having Kidney Stone

Hi, I was sure I had a kidney stone as I am having severe pain in my left flank. Ultrasound yesterday showed no stone in my left kidney and appeared normal however this is what was found in my right kidney: -Mild right hydronephrosis/pelvicaliectasis with several small punctate hyperechoic foci representing vascular calcifications versus nonobstructing stones. My first question is- is this something I need to be worried about and see a urologist for? My second question is - I was diagnosed with Spondyloslisthesis several years ago and the first time I mistook it for a kidney stone. Perhaps that is causing my current pain? It s been several years since I ve experienced it and if I remember correctly I saw a spine Dr. Who did injections to relieve the pain...is this still what protocol would be? Thank you for your time. Brenda