Talk to Diabetologist on Prediabetic

I had gestational diabetes and now i am on postpartum 5 months . I have been on keto diet since two months now, i was asked to get Glucose Tolerance 2 hr test done by taking 75g sugar.

My results are following

Fasting 5 mmol/l 2 hr random 8 mmol/l

I want to know is there a possibility that keto diet (no sugar n almost no carb) has affected the results and should I retake it or the results are justified?