Rbc is 4.15, hemoglobin is 13.2, hematocrit is 39.8, wbc is 4.8. platlts at 77 (low plts runs in fam) father has leukemia. should i be very concerned?

Not likely: Assuming these are your numbers and not your dad's. Remember that for a diagnosis of leukemia you should have symptoms consistent with it and the morphology of the white blood cells is critical- younger forms being usually found in peripheral blood. You do have thrombocytopenia- mild that is possibly familial, but I would suggest reducing the amount of alcohol you drink.