When i first fell pregnant my Hba1c was about 9. Sadly I miscarried. I started to pay far more attention to my diabetes than ever and managed to get my Hba1C right down, however, I miscarried twice more. I underwent extensive tests and my husband has blood taken too to check for any incompatabilities.
11 months after my first pregnancy, I fell pregnant for the fourth time. I had antenatal checks weekly at a joint medi-obs clinic and maintained good conrol throughout by testing what elt like 100 times a day, but to be honest, I wanted a baby more than anything and would have done whatever it took. My daughter was born very healthy and remains so at 8 years old, I also have a healthy boy of 5.
Being diabetic and pregnant is not easy, insulin requirements change almost daily and increase dramatically due to the physiological insulin resistance pregnancy causes, but it can be done with the support of the right team and some determination.
I would recommend that you spoke to a different healthcare proffesional. Are you under a diabetes specialist nurse? You should be able to access pre-conception advice/care from your nearest hospital which will be far more informed than your GP. Also, preconception you will need to get a prescription for Folic acid 5mg. The stuff you get in the shops is only 400mcg, but with diabetes there is a natural increased risk of spina bifida, hence the increased dose required.