Happens to me all the time. I never give myself****reacting insulin at night. A few times, I've gone to bed with my sugar in the 400's and have woken up in the 70's. Depending on my activities during the day, and bedtime snacks. The only times I've had seizures caused by low bs has been when I was waking up in the morning. Rather be high and need a needle in the morning, than siezure at night.