Hi Kirst,
I'm a type 1 on pump and currently 10 weeks pregnant and I follow a vey low carb diet. I made this change about 6 months ago to get my HbA1c down pre-conception - it was 7.8 in Dec 2013 and 6.7 in June and 6.0 a couple weeks ago.
I read Dr Bernstein's book....it looks daunting but is actually very easy reading and quite funny in parts! He advocates a very low carb diet and gives lots of useful tips. Making the change has not been easy, I'm a huge lover of bread and fruit but it was the only thing that I could get to work to get my control improved. Despite carb counting, DAFNE, blousing 30mins prior to meals I couldn't get rid of huge post-prandial spikes and then crashes but with very low carb diet it seems to have done the trick.
Main things I've cut out include: all obvious carbs (bread, pasta, potato etc), anything with sugar in, ALL fruit incl fruit juice (sad about this). SO what does this leave? Well breakfast is eggs +/- bacon/avocado etc. lunch: salad with something yummy like chicken/fish. dinner was already carb free in our house with meat/fish with veggies or salad.
One thing I've found a bit difficult to work out is that I still need to bolus for protein loads sometimes as that can still spike my BMs (not to same extent a carbs and always later).
Anyway, I hope this is helpful. If I can be of more help just let me know.
Good luck!
BW
Jess