Here comes the fever again

Just when I rejoice of Keona's KUB (Kindney, ureter, & bladder) ultrasound result, she's having fever again. We brought her to the pedia and her doctor said that it might be just viral infection because there's no bacteria growth in her urine culture which we just did few days ago. If it's just viral, fever will be gone in 3 days. Today is her third day, and so far, she has no fever since midnight. Hopefully it will not go back today.