What Causes High WBC With Sinus Infection And Swelling And Pain In Bones?

Hello - My doctor recently referred me to a hematologist (I am awaiting an appointment) for high WBC. According to my most recent lab results (completed 12/11/13) my WBC is 12.8, with everything else falling into normal range. My segmented neutrophils are 55, monocytes are 9, lymphocytes are 34, and eosinophils are 2. My lab work completed 11/6/13 was normal except for WBC of 14.7, with segmented neutrophils are 54, monocytes are 9, lymphocytes are 34, and eosinophils are 3. My previous lab work from this year also had high WBC but I don t remember the values. I do not have a history of of WBC before this year. I am 32, female, and suffer from chronic sinus infections and severe allergies, which cause nose bleeds. Low energy, but thats pretty typical for me. It does seem that I am healing slower than I use to. I also have a history of joint and bone pain and ankles swelling My questions are these: 1) Are these symptoms of something that is possible serious? What could they suggest? 2) What should I expect when I finally go see the hematologist for the first time? Thank you, L