is my Dr. doing his job?

Ca
I see so many women saying "My Dr. says I'm too small for  vaginal birth" or "my cervix is narrow" "my baby weighs approx. this much at so and so weeks"
My Dr. has never given me a hint on what my babe weighs. Has never mentioned my birth plan. Has never expressed any concern for my size and delivering a baby, although everyone I talk to seems to think I'm super small framed and will have a tough time delivering. 
He's never mentioned whether I should do just fine or anything! 
We haven't seen our girl since our anatomy scan... and he doesn't seem interested in figuring out how big she is, or anything. 
I know I'm just growing impatient... and I would like a guesstimate on how big she may be & how it may potentially go for me, but he doesn't offer much. He's been doing this for 25 years so he's seen and heard it all .... i am afraid if I even ask, hell brush it off. 😑