Waiting until 39 weeks to deliver twins?

Lauren

My doctor originally said he would want to deliver our didi girls at 37 weeks, then pushed it to 38. Then he scheduled the c section (they're breech) for August 7th, so I'll be 38+6. I feel like I'm being treated based on what is convenient for him rather than what's best for me and the babies. I've read that 37 is the lowest risk time to deliver didi twins. Anyone out there go longer? Should I say something, and if so what do I say without sounding like a crazy mom? FTM, baby A is 6lbs9oz and B is 7lbs1oz.