pelvis checked?

FTM here.. so I had an ultrasound at 32 weeks bc my doctor was concerned with how big my baby is (almost 6 lbs at 32 weeks).. fast forward to now. I'm almost 37 weeks & still have never been vaginally checked (not the right wording but you get it) at all. Anyone else like this? How do they know I'm normal inside if they haven't checked?? Getting a little anxious here..