Childhood illnesses

My daughter is sick. She's had a fever for a week now - low grade for the most part but a fever nonetheless and up to 103* at one point. I took her to the doctor today and we've ruled out strep, pneumonia, and a urinary tract infection. We now must do blood work to see if it's mononucleosis or some other weird thing. She's miserable and I can't do anything to help her. Breaks my heart.

edit (update): it wasn't mono, pneumonia, or any other weird thing. She just had an infection somewhere (her white blood count was low). Still no idea what it was but she's all better now. (1/17/12)