What exactly does it mean if blood, protein, and leukocytes are present in urine?

Several issues: Blood (hamturia) and leukocytes (wbc's in the urine) are common signs of a uti, and you should be evaluated and possibly treated with antibiotics. Protein could be a sign of high blood pressure, posible diabetes, or a simple finding of early kidney disease. Have yourself examined and treated as necesary and then get a follow-up urine as part of the process. Good luck.