The elevated WBC indicates some sort of infection I think. I don't know how high it has to be before they start worrying about other things. Giant platelets can occur with bleeding. Try googling "elevated neutrophils." You might also try the eosinophils and basophils. Sorry I can't be more help, it is only my RBC's and platelets that are out of whack number wise.
Do you have a follow up Dr. appointment? You will read all types of scary stuff on the web, ask a lot of questions of your medical provider and try not to freak out. So far, every self-diagnosis I have given myself has turned out to be wrong
Keep talking to your medical provider. Let us know how you are doing.