white cell count is good, I would definatly be leaning towards mono then, as its probably something viral.
Lyme's you get from ticks. You will also have this large rash type of bullyseye pattern, it would only be hard to miss if it was in the hair and such. But it sounds so mono.
sounds like it could be mono or some other virus similar to mono. Just make sure she gets plenty of fluids and rest until you find out from the Dr. for sure.
For our Pediatrician it was not the first thing they thought of. As a health-care provider, unless someone is "toxic" and only been sick for 9 day's, it is usually let it run its course. After 10-14 days then more needs to be done. My son was 15 when he had it, high fevers, 103-105. But that is not unusual for him. It was when he started peeing coke, that i got worried and took him in to the Dr. His liver and spleen were involved, which is common. The liver involvement was causing the coke pee. I was better in about a month. We think he got it from sharing water bottles at training. But, it was bad timing he was on the varsity cross country team as a freshman and missed the State meet.
So, if you daughter is drinking and peeing, I think you can wait a few more day's before you pursue it. BUT, if you are worried follow you gut instinct and get you questions answered.