Induced because of gestational diabetes?

danielle
I have GD and im on insulin. Ob just said they won't let me go past 39 weeks. We got new insurance around 20 weeks and I had to switch to kiaser. My dating scan with my other dr said my due date was 7/28. That matches when we had sex and concieved and other ultrasounds I had. My new dr is going by my LMP and has the date as 8/3. That's almost a week off. I know they induce early because the chance of placenta failure is higher with GD so now I am scared since the date is off. I don't want to chance the placenta failure but I don't want him to come to early either. Just wanted to hear other people's stories and opinions.