Hi, Well I would be concerned. I am not medically trained so don't know what other factors may have affected your blood sugar levels, I think a visit to your gp is in order, he will probably retest you. But no some people's blood sugars are not higher than others normally.
I am older than you and was pretty surprised when I had a blood test coming back as pre diabetic, as I was slim and fit, however it did run in my family.
My figures are now normal which I achieved by low carbing.