Hi Emma,
I saw that no-one had responded to this so I thought I would, even though it's probably not the response you're looking for.
My pregnancy was absolutely amazing. Never had such good sugar levels and I felt better than I ever have. If I could be pregnant all the time, I would!
However, my daughter was diagnosed at 26 weeks gestation with hypoplastic left heart and when she was born was also found to have truncus arteriosus, aeortic septum defect, ventricular septum defect, Pierre Robin syndrome and a narrowed trachea. All linked to the same development point in the pregnancy. There was no reason for it, no genetics and nothing I could have done to prevent it. I was on Lantus (which is normal now but wasn't then) and not on higher dose folic acid because my doctor was negligent. I had no pre-pregnancy care because of him either despite him knowing we wanted to try.
Who knows if it was the diabetes to blame... and I hope that one day - it'll be 5 years in May since she was born and I'm 30 next month too (I was told by the DSN I had to have all my children by the age of 30, but is this outdated information?)- I might become a mother again so I hope there is some way that I can have a positive outcome. I often think that perhaps adopting would be easier and better for me long term, but my husband was always against it and now that we've split up, I can't see me getting accepted for it.
I'd urge you to go to the doctor and insist on higher dose folic acid as soon as you decide that you'd like to try. It's not going to hurt if you don't get pregnant and you should have it for 3 months previous to conception. My consultant has said if I want to get pregnant again, I should go for an HbA1c of 6.1 and blood sugars of 6.1 2 hours after eating. Very tight control and they're going to put me on a pump hopefully beforehand. As you've said your HbA1c is 5, that sounds excellent! Wish I could get that!
Anyway, don't want to put a downer on you by telling you what happened but that's my experience of it. If I could do it all again, I would have been harder with the medical 'professionals' and asked for the things I wanted instead of being afraid of conflict.
Take care,
Angela