@Quill I would work on basis first test shows you in the diabetic range. Look at the Freshwell site/ app for guidance on diet. If you are overweight or carrying extra round your middle i would aim to lose some of it. I note you are 42 so changes now will be good for your overall health. Some people go on an 800 calorie a day diet. Check the forum for threads about the Newcastle diet. It may be at this stage a low calorie diet is a bit too brutal.
I was told my cholestral had crept up and discovered my annual blood test wasn't tested for diabetes. I had started peeing a lot and asked for a test. My reading at end of June was 69 which horrified me. I had cut out pastry cake etc and then went for fish eggs cheese and veg. My HCP said you needed two readings to be diagnosed though I behaved as though I was now diabetic..
My second reading 4 weeks later was 64. I saw a diabetic nurse 3 weeks and started on metformin. Three weeks later my reading was 58. I am now 44 but on two medications. I knew very little about diabetes until I joined this forum in mid August. I had already used the helpline.
I effectively went low carb between 80 and 130 and started losing weight. Other members who are not obviously overweight have reduced carbs but increased fat and protein.
Consider reducing carbs eg potatoes rice pasta Try to remove added sugar.
Try and move more even a ten minute walk.
Look carefully at what you are eating and see where you can change, for example I have bought some pasta alternatives. Freshwell gives alternatives for some things you may want to eat.
Don't panic and don't cut too much too quickly. Smaller portions and more veg will work.
Given the timescale I expect your second reading will be below the diabetes threshold.
The only thing I am not sure of, is if you are diagnosed as diabetic you get eye and foot checks annually even if after diagnosis you quickly go below the diabetic range. However, I'm sure most people in your situation would prefer the health benefits of lowering blood glucose.