Prediabetes Pre diabetes’s

Hi I was told by the doctor I was pre diabetic I looked it up I been on low carb my blood when checked by the doctor was 42 mmol. It is now down I. A morning to 8.5. Sometimes been 5.5 but average 8. Not sure understand if insulin resistance I making too much cut out carbs. Type 2 but type 1 is that when you don’t have enough sugar how do I know if I’m heading type 2 or type 1 or can I reverse it by diet and exercise
Thanks Steve

Thanks

Yes testing with a kinetic tester