Hi Squirrel, I assume from the amount of levimir that you say you are taking, that you are type 2? Levimir dosage is very weight dependent, may I ask what you weigh? If you were type 1 the best way to check if you are on the correct dosage is to fast for at least 10 hrs and keep well hydrated, the best time to try this is over a weekend when you don't have to work.
If you try it take your bg several hrs after your last meal, say if your last meal was 5pm, check your bg before going to bed, make sure you are well hydrated with plenty of water before sleeping. take your normal dosage of levimir, when you get up in the morning check your bg again, and do not eat breakfast, take it again at ten hours, by this time all the glucose will have gone out of your system and if you are taking the correct dosage your bg reading will be around the same as you had before sleeping, if you have taken too much your bg will be lower, if not enough it will be higher. Just adjust up or down next time.