Sick Again?

I'm home today with Lil' Bit - the third time in less than two months that she's complained of "I'm going to throw up" and been running a fever. The first time tests came back negative, but the doctor felt it was a sinus infection. After a few days of medicine, she was fine and back at school. When it happened a second time, the strep test was positive, and antibiotics and meds worked and she's been back at school having a good time. But this morning, she's got the same symptoms and a 101F fever - and we've got a 10am appointment with the pediatrician. This kind of thing happens all the time, but I'm a little concerned about the frequency when we'd gone most of the school year without any problems.

Post-Doctor Update: Thanks for the prayers and comments. Most likely a urinary tract infection, but we won't know for sure until Thursday or so. For now, it's Toon Disney and chicken nuggets - woo hoo.