Hi dee-sam
I fell pregnant three years ago with a hba1c of 9.6, the minute I fell pregnant I managed myself intensely and brought it down within weeks to 5.9. I think its more important what your sugars are doing at weeks 3-9 when the organs are forming, rather than actually at conception.
My baby was fine, but unfortunately I developed proliferative diabetic retinopathy as a result of the rapid drop in blood sugars coupled with pregnancy hormones. So the recommendations for control are not just for the baby but the mother too.
Can you contact your local antenatal unit and insist on speaking to a diabetes specialist midwife? I can't imagine they wouldn't at least talk to you if you have pre existing diabetes? You should get seen in clinic pretty quick.
The targets in pregnacy are 5.8 or less before meals and 7.8 or less one hour after. The hba1c target is below 6. it sounds daunting but you can get it down in weeks if you are managing it intensely, as I did.
I am now pregnant with my second btw.
How pregnant are you? If you've got things under control pretty quick and you found out you were pregnant early on, you should be ok.