Hi
@Milly59 and welcome to the forum.
Do you know if your relatives had/have Type 1 or Type 2? I ask this because you talk about injecting - which I presume means injecting insulin.
Certainly Type 1 seems to be partially hereditary, but Type 2 , not much since there appear to have been be few Type 2 diabetics before modern foods.
That need for sleep seems likely to be a sign of high blood glucose. Do you have a Blood Glucose meter (such as a Gluco Navii or a TEE2) to check this? If you have then you can also use it for testing your meals.
Stress as well as injury or infection raises Blood Glucose. So try to form a plan as to how to deal with it, then stop worrying!
Type 2 diabetes can be thought of as an intolerance to the quantity of carbohydrates in the modern diet. All digested carbs turn into glucose and our bodies can only stand a certain amount of glucose in the bloodstream - it must be either used up as energy or stored away as fat quite quickly! So despite what you may have been told about dietary fat making you fat, it's mainly excess carbohydrates (with help from excess calories) that actually makes us fat. So cut down the carbs (replacing some/all with extra Protein and traditional fat ) and not only does Blood Glucose reduce, but so does weight!
If you are prediabetic and not just at the very start of LADA (a form of Type 1) then it should be relatively simple to get it under control. Just weed out the meals which raise your Blood Glucose by more than 2.0 mol between just before eating and 2hrs after first bite. Note that lots of things you have been told are 'healthy' will actually spike your Blood Glucose. Mainly grains (whole as well as refined), potato, flour, rice, pasta, tropical fruits and fruit juice.