Yes, I have the exact same issue. It has never shown on the blood test, but I know it's there.
Every morning, before I even get out of bed, I use acupressure points for hypo-glycemia, and it calms down my system from whatever cortisol/adrenalin is overstimulating my system. It works really well. I do them during the day when I need to, as well. I've started to take small doses of chromium picolinate, too. The thing I need to do, asap, is to get off of simple carbs. I have many food allergies , so until I can eat more complex carbs, I'm eating some small amounts of simple carbs. I think that improving my diet will help a lot. I don't need the doctor's approval to do some taking care of me. :)

The "not showing in the test results" could be insulin "resistance"? Enough glucose in the blood which is unable to enter the cells?
Im in the same boat. Wait for chromium to arrive to see if it helps.

The most frequent causes for insulin resistance ive read: cortisol too high too long time, too much toxins inside for too long time, lack of chromium. Some added lack of manganese or even D3? Who knows...