High counts can cause strokes, etc., and can be a marker for polycythemia vera. However, this is always above a Hct of 50. Re-check it in 3 weeks, but I'd keep a close eye on this. Are the white cells lymphocytes, neutrophils, etc. These are all important questions.
Viral syndromes are notorious for causing low white blood cell counts.
Simply repeat the test about 10 days later. There are numerous causes of low counts. I'd simply recheck it before getting too concerned. It can mean several things depending on the height of the blood count and the type of cells that are elevated. Many inflammatory conditions can elevate one's blood count and this is normal under certain stresses.