hi welcome to health care magic need not worry presence of blood,and leucocyte that is WBC is coomonly seen in UTI that is urinary tract infection which is again coomon during pregnancy.drink plenty of water and maintain hygiene throughtout the pregnancy. When fat is broken down for energy, the body makes substances called ketones . These are passed in the urine. Large amounts of ketones in the urine may mean a very serious condition, diabetic ketoacidosis, is present. A diet low in sugars and starches (carbohydrates), starvation, or severe vomiting may also cause ketones to be in the urine.so for confirmation doctor must have ask for next sample. good luck stay healthy