moray lass.... I find that it doesn't really peak... whatever I am at when going to bed is pretty much where it will run through the night & then there will be a rise when I wake, say from 5.5 to 7.5, this I think being due to the liver performing a clear out of glycogen that it doesn't think it needs any more. If I were not to eat in the morning, my blood levels will then drift back down to the 5.5 without any rapid acting.
I also find that the Lantus can run out of steam after 18 hours and have experimented with splitting my dose, taking two thirds in the evening and the other third, late morning. Currently I'm back on a single dose just to double check the results.
I've only been diagnosed for less than a year & am finding that my insulin use hasn't settled to a steady state. I think this is the 'honeymoon' effect where the pancreas recovers slightly after diagnosis as better diet, more exercise & the insulin take some of the strain from an ailing organ. While this means you can use less insulin, it's also quite unpredictable as to carb/insulin ratios so good monitoring is worth it's weight in gold in the early days.
It does, occasionally, get quite frustrating when you dose and your sugars don't come down as you expect or worse go lower than you can afford and have to resort to the jelly babies! As long as changes are thought through & given a chance to work, you shouldn't go far wrong.
