I know that as a T2 my problems are slightly different, but I’ve never had a problem with Lantus, indeed I was told by my DSN that I couldn’t possibly go hypo from using it. I’ve recently reduced my Lantus (purely for logistical reasons) and increased the dose and frequency of my Novorapid injections. All I can say is that @Annette and @mustard have the right of it, you need to try different combinations and patterns of use until you find one that works for you. I would probably disagree with @Annette about pestering your DSN, specialist, or clinic, they don’t have the problem, you do and you are the only one who can sort it. Generally, when I adjust my meds I present my DSN with a fait accompli and then discuss it with her.
Whatever you do, keep trying different combinations and get that BGL down! In the meantime, talk to your clinic about a pump, that really is a reason to harass them!
PS: Don’t wait for the promised phone call, keep ringing them up!