I was told I would never conceive, let alone carry a baby to term, from a very young age and all of that was reiterated when I was diagnosed Type 1 - we suffered a miscarriage (we were unaware of the pregnancy), but were fortunate enough to become pregnant again, I carried the baby to 37 weeks (to the day!) and in a couple of weeks he will celebrate his 2nd birthday :)
My best advice is find a high risk pregnancy clinic/doctor - and an endo who treats pregnant diabetics. It provided us with a wonderful support system and a network of people all working together for the benefit of me, my diabetes and my baby.
I was taken off Lantus and put back on to Humalin N - aside from the changes in my dosages (of both the Humalin N and my Humalog) and wee bit of high blood pressure during that last week, everything went beautifully!
I wish you the very best of luck :)