Traces of blood found in urine sample, xray showed some white spots in pelvis, but was not told what it could be?

Your job: ask & work: to understand. It is your body; not that of others who primarily focus on their priorities (human nature for all of us). X-Ray=Hi-frequency electromagnetic radiation, i.e. above light frequencies. X-Rays simply show shadows, bone vs. water (tissue) vs. air. White spots are likely bone (absorb/block X-Ray from reaching/exposing the film). Is blood from urinary bladder or kidneys? Big difference!