Mono/di questions

I’m having mono/di twins and I just have a few questions. I’m currently taking aspirin to prevent preeclampsia (so far so good), I’m also taking iron pills but still borderline anemic and looking into getting infusions done next 😥 and was just diagnosed with gestational diabetes. I’ll be 28 weeks on Thursday and prior to the GD my OB mentioned he was okay letting me go til 38 weeks but I’ve read so many risks about going past 36+6. With having low iron, GD and preventing preeclampsia is there a likelihood that he would change the 38 weeks to sooner? I don’t have my appointment with him until Monday so I will ask but I’m slightly nervous about actually going to 38 weeks there being an issue because of it. He also is confident I won’t go that long in general but that it’s the cutoff for him. Any thoughts, insight, resources would be greatly appreciated.

Like I said I will ask on Monday just curious until then :)