1. Can you post a few days meals so we can see any potential hidden causes?

2. Did you go same lab? Each one has slightly different cut offs for this test.

Deep breath- try not to get frustrated. I know it is hard when you do all the "right things" and your body doesn't cooperate. And hey, you aren't diabetic, so even staying just behold the threshold is nerve wracking at best, you are keeping it in check right now. You might want to come peruse diabetes sub forum down below.
I'm a type 1, but almost all the others there are type 2. Besides we have more in common than we think.