Prediabetes and pregabelin

Seems it might be more likely to cause hypos.
https://bnf.nice.org.uk/drug/pregabalin.html

You might try ditching the fat free approach for a while and go low carb. Has worked for many here.

Low fat will have no effect on your glucose levels - fat is part of a totally separate system, it is an ideal fuel for those who have glucose impairment.
I suggest that you tot up your carbohydrate intake and see just how much sugar and starch you are eating on a daily basis. Being prediabetic now doesn't mean that you will progress to being fully diabetic, but acting now to alter things is probably essential.
I found that getting a glucose meter and supply of test strips helped a lot to reveal just how my blood glucose levels changed after eating various foods.

Martino said:

Thanks very much. I am unsure how to calculate the carbs and sugar intake. I would be very grateful if you would let me know how to do this and also what the recommended intake figures are. I am very keen on trying not to move to diabetes and will try anything that will help. Which of the glucose meters around are considered the most reliable?

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You could calculate this by looking at the carbs and cals app and just keeping a diary for 3 days. How much carbs/sugar (they are all glucose in your blood btw) anyone can tolerate before they run into metabolic problems is highly individual and a significant proportion of diabetics type 2s are not overweight with the converse also being true.
https://www.carbsandcals.com/app/app
There is plenty of good guidance on this site plus sites like Diet Doctor that advocate a high fat low carb approach aimed at keeping insulin levels low which will in turn reverse the insulin resistance that is likely making your blood sugars abnormal.