Question regarding CS

Hello Mothers, Currently 36weeks today. As per biometry ultrasound, baby's weight is 2.9kg (+/- .4kg). By God's grace, okay naman ang pregnancy. No highblood nor gdm. So kanina during ultrasound sabi ni OB medyo malaman daw si baby, and upon IE (first time) kanina, sabi ni doc, tight daw masyado ang vagina. And if ganon ang case, at dahil mas lalaki pa si baby, baka daw maCS. May iba pa bang naka encounter ng ganito? Thanks