Not the juice...

Hey everyone,
Sorry to post...yet again...
I posted yesterday about how I thought juice was raising my blood Sugar too high. Well apparently it isn't the juice because I woke up with a blood Sugar of 400 this morning, and that was obviously without any juicing cause I woke up with the sugar. It spiked up to that from 166 4 hours prior. I just don't know what to do!
I would go up on insulin except my Sugar runs great the rest of the day once I get that high down, and the insulin I take is a 24 hour insulin. I wonder if it has something to do with being more toxic in the morning or something? I also wake up very dehydrated every morning for some reason despite drinking lots of water and juice all day, and wake up with an extremely bad headache.
I'm stuck, I'm not sure what to do, it's scary running this high, I feel like complete crap when it runs this high.
Thanks for any help
April