Hi Yu Shing,
I'm so glad you bring this up!
I had my first baby last February 2013. I can remember all the same fears you're experiencing. I had a lot of anxiety.
I conceived with an A1C of 7.2% and was told to work for an A1C around 7.0% or lower. My doctor was happy with 7.2% though.
Today I have a healthy baby boy and he was worth every ounce of work.
One tip I can offer is to test, test and test. I've never been a great carb counter but I do test frequently to catch post meal highs. If I catch them early enough then I can act quick and prevent long hyperglycemia periods.
I do not eat the same foods everyday, boring. I get more concise with carb counting when pregnancy planning but like I said I test frequently, like 1 hour after each meal and snack.
A quick refresher with a dietitian won't hurt. I also found it helpful to have carb counting tools on my phone to help estimate.
One final tip is that I balance each meal i.e. carb, protein, veg. This way the spike in my sugars is not too dramatic as it would be if I just had a big bowl of rice. Protein, fat and fibre slow down how fast sugar goes into our bloodstream.
Oh and I look for delicious but low carb treats, I'm human after all. I tended to eat chocolate when planning my pregnancy because it doesn't make for a post snack high. I'd also treat myself to a sugar free and caffeine free latte at my favorite coffee joint.
Don't be too hard on yourself, you are doing an awesome job. You are your pancreas and that's freakin' hard. You can do this.
I'm in pregnancy planning mode now too for baby # 2, so I'm right there with you trying to achieve a great A1C and trying not to freak out too much since this disease does not give us a break!
If you're interested in following my journey check out my type 1 diabetes pregnancy blog.