Fasting glucose above 120 is considered diabetic, and is not normal.
Take this American Diabetes Association Diabetes Risk Test http://www.diabetes.org/risk-test.jsp
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If you did three glucose checks in three minutes, I guarantee that you would get three different results. Diabetes readings can go well up into the hundreds and higher while non-diabetics tend to stay in a very moderate range (say maybe 80-130). Speaking as a Type II diabetic, your results are wonderful. Your weight is fine. Unless you feel badly (excessive thirst, tiredness, etc), I see no need to worry.
It's worth getting checked out with a proper lab test through your doctor. You stated you had not eaten anything, but how about liquids (coffee, soda, juice?). Regardless, if that reading was correct, you want to confirm and act on it as soon as possible. The "nice" thing about this is that if this is a sign of a blood sugar issue, catching it early would allow you to take action and minimize any possible problem. So yes, see your doc. Let us know how it goes!