I wouldn't worry too much about morning readings being between 5.5 and 7.8, as you say those are not terrible, in fact they're pretty good (though I understand the frustration when there is no correlation to bedtime reading - I get that too, it's only occasionally I can say, like I did today, that I know what caused the morning reading being higher or lower than usual). I'd be more concerned about going from 7ish to 12ish and then back to 7ish for no apparent reason - that was what sounded like Lantus to me because that's what it seems to do to me. Its pattern is supposed to be smooth but actually for me it's very bumpy. But it's early days for you, and you are on a higher dose of Lantus than I am (I'm on 5 units), so you may find you are able to iron the bumps out with a bit of experimenting with injection times/mealtimes etc. At least you are not getting up in the middle of the night every night to eat a jam sandwich, which is what I did during my first week on MDI - they put me on 16 units of Lantus when I needed 6