Did you know that writing in all caps online is considered "yelling"?
STOP THAT" MAKES IT COMES ON WORST JUST RELAX DO WAT U DO
Type 2 diabetes develops slowly but Type 1 develops very suddenly. However it sounds like you have done all you can to check for diabetes and you are fine. It is not certain at all that you will develop diabetes just because it is in your family.
I agree with Sally that you should seek a referral to see if you are suffering from an anxiety disorder and need treatment.
Diabetes normally develops slowly over time.
Regular monitoring is a good idea - at your age once a year is probably fine. Occasional testing before breakfast also a good idea.
But it sounds like you don't have diabetes, but are really worrying about diabetes. You are doing what needs to be done which is paying attention to healthy diet and exercise.
Maybe you can get some help with handling your worry and stress also.