From looking at your ss, and the previous post linked here, I would think it may be an idea to start at a dose lower than 3u, just to be sure you are not giving too much now. You can't really tell what's going on if there are not many checks between the am and pm shots. When I adopted Oliver, his numbers were very high, and at 4uLantus, but to be sure it was not too high, as some people claimed it was, we went back down to 1u and worked our way up following the protocol.
Tight Regulation Protocol
I don't know of anyone starting Lantus at 3u if new to insulins, but others can sort that issue out for you. There are times when changing from one insulin to another that one may start at a higher dose, but I don't know if that's the case here.
While you're waiting, here are some links for you.
This one's a good starting point for all sorts of info.
New to the Group
You will find that Lantus is quite different from your current insulin.
Tight Regulation Protocol
This one will help you eliminate alot of repeated questions like what you are feeding, or any other health issues, weight, age, etc.
Profile Creation
You can find lots of foods in this listing.
Binky’s Food Lists