I start to get tired as I go over 8.5 so I expect that is what is causing your tiredness. You need to eat but stay away from carbs for a bit to let your numbers come down. What are you planning to eat tonight. Try an omelette or liver, bacon, etc with salad/veg - no bread, potatoes, rice, pasta. Check everything you eat for carbohydrate content (not just "of which sugars") and try and stay with foods that are less than 20 % for the next few days and I expect we will see your levels come down and then the tiredness will go.
Have a read around the forum for ideas of diet changes you can make to bring your levels under control for life and ask any questions you may have. Oh and welcome to the D club. Sorry you had to join us but you are more than welcome.