When I woke up today my blood sugar was 12, a little high so I added a few units to my usual insulin. A couple of hours after breakfast it was 11, going down I thought. I didn't test at lunch since I was rushing. I felt a little sluggish but I put it down to not getting much sleep last night. I just tested and it was 24! I have no idea why. I have injected insulin but can't work out why I am so high and am panicking a bit. Can lack of sleep affect blood sugars? I can't test ketones as I am at work and strips are at home.