I blame the Levemir for night hypos.
Night hypos used to be a regular feature of my life. i used a CGMS and found dreadful dips in my BGs around 4 hours after taking my levemir. I did some research and found that if you're on a small dose of levemir ( I was on 12 units) it has quite a peak after 4 hours (although it's designed to provide steady coverage , in reality it doesn't).
I tried splitting my dose - made matters worse.
But as far as dealing with night hypos goes, I always woke up with them, because of the adrenaline. But I couldn't always take any action - night hypos can cause a kind of paralysis, which is very frightening, especially when sleeping alone. Glucose had to be under the pillow, as reaching as far as my bedside table was impossible. On the occasions I wasn't able to grab the glucose, my liver obviously kicked in with a glycogen release, and the next day woke up with high BG and felt pretty dreadful, but alive!
I'm now on a pump, which has solved the night time lows completely, and therefore taken that anxiety away - I don't believe I'll ever wake up sweating and shaking and paralysed at 4am again. Hurrah! However, being a new pump user, i have plenty of other things to worry about instead!