So tired all of the time.. why?

Possibly depression, poor diet, lack of quality sleep. Avoid sugar and caffeine, eat a healthy diet, take a multivitamin and exercise. Get your blood work done to check if anything is lacking.

diabetes makes you feel tired when your blood sugar is too high or too low. avoid sweet food and high carb meals.

Your main problem seems to be a sleeping problem caused by stress. Some light exercise at bedtime often helps you to relax, unwind and switch off and that often improves your sleep. Your fatigue problem could also be due to stress. Perhaps you need more energy enzymes from more fruit and vegetables. Under eating (if relevant) or dehydration (if relevant) and even iron anemia as well as insufficient sleep are other possible causes of fatigue.