Hi Sally, my fasting glucose readings have bounced around in the pre-diabetic range for the past several years, with the highest being 126, I think. I've had several A1c tests, with results ranging from 5.5 to 5.9. My doctors (both primary and endocrinologist) have said these results are okay and don't require treatment of any kind.
I've tried controlling glucose levels with diet and exercise - sometimes it works, sometimes not.