CONGRATULATIONS on your pregnancies girls.

With my 1st pregnancy I was sent by my GP for an ultrasound at 6 or so weeks, it may have been 8 actually. I'm not sure why as I hadn't had any trouble previously, I think they can send you if they want to, was all on Medicare.
With my 2nd I paid for one at 8weeks as we wanted to see bubs heart beat b4 12 weeks.