| I've never been on the other insulins you were on, but I've been on Lantus with Humalog for about 6 months now, and I think I can at least shed a little light on it for you.
It's supposed to be a 24 hour insulin. That can vary with some people (between 20-26 hours I've read), but you won't know how long it's lasting for you this early.
It takes 3 full days to see the full results of what it's doing. This is also true for any adjustments you make to your dose.
It has a peak at around 4-6 hours. They say it is a slight peak, but it's more noticable for some people.
Since you just started taking it, I would imagine it's going to take some adjusting to get the dose exactly right.
I totally understand your frustration, I went through quite a bit of it myself until everything was right. It will get better! | 
