What Causes Blood In Urine?

Hello there! I am 30 years old and I recently experienced blood after urination. I went to my doctor and was given X-Rays and conducted blood/urine tests. While I haven t heard anything from my lab tests, here is what was written about my X-Rays: Technique: Two supine AP views of the abdomen were obtained. FINDINGS:There is a non-obstructive bowel gas pattern. There is no bowel dilatation, pneumatosis or large volume free air within the limitations of these supine radiographs. A punctate focus of radiodensity projecting over the right transverse process of the L1 vertebral level is consistent with imaging artifact/debris. There is no evidence of abnormal calcification overlying the renal shadows, expected location of the bladder or course of the ureters. Osseous structures are grossly unremarkable. Soft tissues are unremarkable within the limitations of this examination. IMPRESSION:1. No evidence of radiopaque nephro-/ureterolith. 2. No evidence of bowel obstruction or large volume intraperitoneal free air within the limitations of this examination. What does all this mean?