i am so sorry about that, but i think i have a solution. Try cutting gluten from your diet for awhile, such as bread,noodles, rice, cereals, and baked goods, these are all really high in sugar and gluten, and could make you feel more irritable, because they have starch, and starch turns to sugar and could bring your sugar levels up. Gluten could be giving you adverse effects on your body and your diabetes family history could also have something to do with it. Stay away from all breads and grains for at least 2 weeks and see if it helps. If it does, you should stay on a gluten free diet, because apparently gluten brings both your mood and energy down. But if it doesn't try eating fish twice a week and really stock up on veggies, they both fill you up, and they will give you more energy! Also try to be active for at least 20 minutes a day, this will help improve your mood and make you feel good throughout the rest of your day!