Routine urinalysis says occult blood trace with rbc negative this is same result i got back in october but in october test also said trace leukocyte esterase with wbc negative?

The tests are not 100% predictive of reality, they are used to screen and all tests are to be interpreted in context of other information like symptoms and physical findings. Cross contaminants could create false positive results often, like blood from period showing up in the urine, however that is not the situation in your case and the tests should be disregarded if you are well.