High WBC yes you should be very worried
WBC above 10,000 is not normal, it's a bone marrow disorder. Platelets may also be low around 80,000 or lower, (normal is 140,000 to 415,000) low Platelets will cause internal bleeding and bleeding from the mouth, nose, ears, eyes, rectum also pinhole bleeds on the arms and other parts of the body at various times this will occur around the 20,000 to 40,000 Platelet Count, and the Red Blood Count may also be low, this codition is called a Myeloproliferative Disorder; early onset Lukemia, sorry to say there is no treatment for this disorder at this time. Anyone with a high WBC needs to see a Hematologist which, is an Oncologist, the study of cancer. Do not delay get to a Hematologist or go directly to the ER if you feel dizzy, have a fever are sweating or have the chills, flu like conditions, you pass out, suffering from severe fatigue you also may have Pneumonia I was hospitalized for these conditions, you may be bleeding from the eyes, ears, mouth, rectum, or blood in your urine, again I was hospitalized for these conditions, if you have 2 or more of these conditions and have been tested with a high WBC go to the ER ASP!!! There are also Blast Cells that may show up in the Bone Marrow, this is fatal all the time. Eat red meat every day, take Green Tea Extract 12 tabs @400 mgs per day and take fish oll, also vitamin D3 4,000 mgs per day (order from Amazon.com) For the Flu like conditions I take NyQuil it helps, I am taking it now . I was diagnosed with this disorder on 8/12/2011 through the present, I have been in the hospital 6 times average 2 week stays, I am lucky to be alive. God bless you. This is very bad, very bad condition, I hate it. It keeps coming back, sometimes I can't get out of bed, and my WBC Count keeps going higher, at 100,000 it's over, or when the Blast Cells come out around 100,000 and up, This is what 9 doctors have told me. This is a very rare condition. Use Google and type in High WBC followed by your numbers, Not much is known about this disorder, even doctors have very little information on this subject, however some Oncologists are very well versed on this disorder, but not many. You are all the blessed . I just don't know what else to say here. Man, Woman, Birth, Death, Infinity.
Copy and past;
Chronic Myeloproliferative Disorders Treatment (PDQ?) - National Cancer Institute
wikipedia.org/wiki/Myeloproliferative_diseasewish