headaches Bad

I have been haveing bad headaches foe a few months. i have been to the drs and they have draw blood and taken alot of test.My WBC came back the first time at 12,000 now they have gone to 16,000. I have having more headaches that last longer. The pain starts in the back of my head and moves to the top. I am very tired all the time and have no energy to do the things i am used to doing.The drs think that there is some kind of infection somewhere but are still unsure. If my WBC keeps going up could it be something els.