My 7 year old daughter has had fever on and off for 3 weeks, low as 99.4 and as high as 104. Complaints of Lower back pain, leg pain, severe headache, and intermittent stomach pain. Chest xray was clear, urine sample "inconclusive." We are on second round of 10 day cephalosporin antibiotics and it has no effect. Waiting results on back xray and cbc....my concern now is that it's leukemia. I am so worried about her because she has always been really healthy....am I overreacting? Is this consistent with leukemia?