Stunned by glycemic test results

[hugues]

Hi,
My girlfriend bought a glucometer for a calorie restriction program she want's to follow. My mother had type-1 diabetes so I know my way around using those little gizmo.
Anyhow, I've tested myself to show her how it works and show her that it was painless and she need'nt be afraid of the so very small needle.
To my astonishment, the test results was 7.7 mmol/L. This was in the morning and I only had a coffee with 1 teaspoon of sugar before (about 35-45 minutes before). Aside from that, I had had nothing for at least the last 12 hours.

I pretty sure I should not have been above 7 mmol/L.

Should I be worried?

Thanks in advance for your answer.