My daughter is 13 1/2 years old and last week her urine test came back with a 4-5 count of red blood cells. This week she had another urine test and this time it came back with a 10-20 count of red blood cells. She does not have a fever, and she says that she does not have any burning or itching of any kind, and no back, pelvic, or abdominal pain. What could this mean?