So... I ended up having both. Over the belly AND transvaginal. They said their policy is under 14 weeks HAS to be done transvaginal. I didn't mind either way! I got to see my baby! Yay!
I had my first at 8 weeks, now currently 14 weeks, but I had a transvaginal one.. but almost all I know had over the belly.. maybe its just a doctor's preference..
I was 10wks, and they did over the belly. EASILY saw my lil boo berry. Usually they will reschedule you for later in the day bc of all the previoua appointments they have already planned. When they do your gender/health scan around 18-20wks, someone else will have to schedule out their appointment like yoi are now because you will be the one with a priority scan :) good luck, its sooo amazing!!!