Check for adrenal problems, Vitamin D deficiency.
Had you start taking an medicine or supplement recently like Vitamin B12? Increased heart rate can arise from it in some people.
Also worth to rule out hyperparathyroidism by doing serum calcium and PTH together. This you need to do especially if found your Vitamin D3 levels below normal range as long standing vitamin D deficiency can making your parathyroid glands to work more.
Nothing to worry about neutrophils, WBC etc if you have no related symptoms like fever, cough and other infection ones.
WBC increases when you are fighting infection. If no fever or related illness then WBC usually in low range and that is actually normal. Neutrophils can vary a lot and if you repeat the same test after some months it will improve.