Hi Jacki. This is not what you want to hear, but I want to give you a bit more information about some of the things you have mentioned. I am not trying to scold you or scare you!! I want you to have information before you make your decision.
The A1c will not give you or your Doctor the results you need. It is an average score of your blood sugar over the last 3 months -- and your blood sugars will have been within normal range for, at least, 2 of those 3 months. Hence, your score will NOT be indicative of any developing issue with your blood sugar. Even if your blood sugars have been climbing for over a week, those numbers are not significant enough to move the other 11 weeks of normal blood sugar levels. This test will not help you.
Lack of sleep, stress and low iron have very little to do with your blood sugar. It cannot skew your results enough to put your blood sugar in a "danger zone."
I can promise you, with 100% certainty, that no doctor will EVER instruct you to "shoot up insulin" at intervals as a "just in case." Taking insulin without a physiological need will result in damaging, if not catastrophic, results to you and your baby. Yes, you may be instructed to to test your own blood sugar (for the good of you and the baby) at intervals. But insulin therapy will not be given without real, and serious, need.
I'm not familiar with your readings about the lack of positive affect that treatment has for the baby. However, research does prove, without any shadow of a doubt, that pregnancies developed by Moms with out of range blood sugars can result in all sorts of terrible physical deformities to the baby, including major heart defects and underdeveloped brain. High blood sugars are not to be taken lightly. Fortunately, you are beyond your first trimester, which significantly decreases the severity of the damages that high blood sugar can cause.
I know this is not what you are hoping to hear, and I'm sorry. I can tell you are very frustrated and maybe even frightened. I wish only the very best for you and your baby. PLEASE follow-up and let us know all about the happy, healthy baby you give birth to in about 10 weeks!