I was told that I was diligently managing my pre-diabetes.

I get my blood tested every four months and get the results back. The last time I got tested, I got scolded by the head of the department. He told me to cut down on carbohydrates. He said I wasn't diabetic but pre-diabetic. So since then, I've been trying really hard to cut down as much as I can. I eat vegetables before meals, and although I can't completely cut out my favorite kind of bread, I only eat about a third of the amount I used to. I'm also trying really hard to drink coffee without sugar. My rice is always mixed grain, and I put more mixed grains in it than before. I got tested again today and my hemoglobin A1C came out at 6.1. Why is it the same whether I eat it or not? I don't know what to do. I can't even eat fruit with peace of mind these days. There's no family history of diabetes, but I'm suddenly worried, so I'm worried.