My white cell count has been elevated. My doctor prescribed an antibiotic and had my blood checked again. My WBC count was still elevated, 12.8 and my neutrophils (absolute) was 9.5. Lately I have been experiencing night sweats and I am extremely fatigue most of the time. I was actually on the phone and fell asleep while the other person was talking. I am wondering should I be worried. My doctor referred me to a hematologist, who I hope can see me next week.
It could be an infection that's dragging on for a while, possibly mono or something like it, or it could be something else. There are so many things that can cause elevated white blood cell count, and infection is the most common cause.
I hope this was resolved already, and that you are feeling great. I had a similar situation before my April hip surgery. My white count was elevated, over 14,000, in between my colonoscopy and my hip procedure. The hematologist realized it was due to the cortizone shot I had received in my knee, 5 months earlier, that was still raising my white count. Then I was finally cleared for surgery! Luckily, it was just something simple!
I would try to think about any other symptoms you might have had lately that could point to infection anywhere in your body. Did your Dr find evidence of infection before the antibiotic was taken? No antibiotic treats any/all infections, so the success of treatment depends on where it is and using an appropriate drug. The night sweats and fatigue could certainly go along with the high white count, and a chest xray, urine analysis, and chemistry panel with liver tests could be helpful for initial investigation. Inflammation can elevate white counts also (in absence of infection) so inflammatory markers like sed rate and CRP may be helpful. This number is not in the range that would cause alarm, but warrants trying to find the cause.