Gall bladder or kidney problems.

I got a sudden pain in the lower backside, no pain was in the front stomach side at all, I make the sonar ray examination and CT, surprisingly the reuslt was small stones in kidney of average 3mm and Gall bladder with diffuse echogenic wall thickening reaching up to 5 mm and  is  harboring multiple freely portable calculi 3 to 5 mm in diameter. Also it said chronic calcular cholecystitis . The creartinine is 1.49 and serum uric acid is 8.4, mcv 78.2, MCH 24.1, MCHC 30.8, RDW-CV 16.6 and  liver functions normal . I am wondering is the pain was from kidney or Gall bladder considering I never have that pain before. Also the CT showed that no stones in kidney which is opposite the sonar results!!. Is that case need Gall bladder surgery removal or not, and what is the best option I can do knowing that now I only took cystone and uriven and only face few stomachache and very small lower back pain . Attached is the sonar results , CT results, kidney and liver functions and cbc results