Hsg/ultrasound

Nicola 🐟 • 💙 Jan 07💙 💛TTC Apr 14💛 💚BFP 5 Jun 16💚 💙💕due Feb 2017💕💙
I'm booked into the hospital to have an ultrasound on the 11th. As far as I know they're going to be looking for cysts and blocks, so I'm wondering if that means they'll do an hsg too? Or is that a seperate appointment that I need to ask for?