Should I be concerned?

Recently, I’ve been having chest pains, headaches, body/joint aches. I’ve been bruising easily and feeling tired, weak, getting those “to the bone” chills even if it wasn’t cold, feeling cold no matter the temperature. At night I sleep with the window open and it’s been about 50 degrees out, but I’ll wake up feeling very warm. My father suggested it may be the flu, despite me not having a fever, so I went to the doctors. She said it was probably just a virus, but took some blood. When she got the results back from my blood test, she called and told me my white blood cell count was a bit higher than usual. She didn’t give me any more information, nor did she seem much concerned. She told me she’d draw more blood at my next appointment and check it then, but my next appointment isn’t for another 3 months. I checked an app I have where I can look at the lab results myself, and noticed that for a year now, whenever I had any CBC’s (which was about 4 or 5 times), all but one came back as a bit higher than normal. I called my doctors office and talked to the receptionist, telling her I was looking and found it's been higher than normal the last year or so, and asked if she could give me some insight as to why that might be. She didn't give me any reason, she just told me that she was going to get me in sooner for more blood work. I have my next appointment in 2 days. I've been looking online to see if I could self diagnose, or at least prepare myself for what it might be, and I found a list of things it could be. I saw that leukemia was one, and I guess that just really caught my eye because I have a 9 month old son, and I'd be more worried about him and what would happen if I did have leukemia rather than worried about myself. I guess my question is, is it concerning? What could be the reason it’s higher? What's the chance it could be leukemia? Should I be concerned?