Was the 14 hours testing done after sleeping or going a whole day without anything? There is a difference.. My blood sugar no matter what goes up if I eat or not during the day if I don't take my meds.

If it is in the morning and your "fasting" was the evening and overnight then you probably have what is called the "dawn effect" You can read about it here:

http://www.diabetes.org/living-with-diabetes/treatment-and-care/blood-glucose-control/dawn-phenomenon.html

Many diabetics experience this. Although you did say you recently had surgery and if you are still healing from that, that could also be the reason why if normally you don't have a high after fasting. 140 is not a terrible number, but if it continues you might talk to your doctor about it and figure out a way to get it within normal range.

Hope that helps.

also if you are not eating your body has it's own defense and will try to add in sugar/insulin to survive, basically it thinks you are trying to starve it and yes the dawn effect can be a pain, even after 18 years dealing, I still experience some mornings over 100, I just let it go and work on maintaining thru out the day

i have been a victim of dawn effect and yes it can be quite frustrating. for me the timing of eating matters the previous night. If i eat around 8, then its in 120 range in the morning. If i eat past 9 o clock...... then it spikes like a rocket.
Have also heard that having protein at night keeps it in decent control.

Try and experiment with these things and find out what works for you. Else consult your doc :)

Dont get stressed

Here is a great article about that....

http://www.diabetesselfmanagement.com/blog/controlling-the-dawn-phenomenon/