What could cause a high calcium count, also have high platelet, wbc, neutrophil counts. Could this be caused by stress?

Need specifics. A minimally elevated calcium may simply be you, since reference range is set so that several percent of healthies fall on either side ; a few mild genetic traits cause it. A greatly elevated calcium always warns of serious disease. Similar thinking for the other labs. Your physician needs to explain these to you in detail. Best wishes.