Concerned about my daughter’s recent blood work?

Concerned about my daughter’s recent blood work. My daughter is Caucasian, 7 years old, about 50″ tall, and 54 lbs. She is taking Vyvanse 20mg for ADHD and Zarontin for CAE. She just started the Zarontin early February. Recently she hasn’t been sleeping well. She has swollen lymph nodes on her neck (one has been there for a while, and she is due for an Ultra Sound of neck soon). Her PCP did some blood work yesterday, and some of the results make me wonder what is going on with me baby? Today she was sleepy most of the day.
The numbers that have me the most concerned are:
ANC (absolute Neutrophil count) – 1.0 Low
WBC (White Blood Cell) – 2.6 Low [yet was 4.8 three weeks ago] -what can cause this drop?
Globulin 1.9 Low
Monocyte 19.0% High

What can cause this deviation from the normal ranges? and the big drop in WBC?