Annie's OB and high risk Doctor/dietitian not on same page?

I just saw my OB today who told me my levels we're improving. I've only been monitoring and on diet a little over a week. The high risk center told me they will give me a week and then put me on meds if they see fit. I have a history of delivering early by 38 weeks. My OB told me as long as my fasting was under 100 I was ok and he really wasn't concerned to much either meals they were a little high but not outrageous. He saw no need yet for meds and said he would start with pills first if anything. Well that's not what the high risk center said they want to go with insulin first since it doesn't pass through the placenta but I've read it could age it. Now I'm confused and have to see the high risk on Monday for consultation on meds. I'm so confused.