Ultrasound, nervous

Hey ladies! So I have my first appt on October 2nd I will be exactly 6 weeks that day. They are bringing me in early because of a missed miscarriage at 10 weeks last June (stopped growing around 7 weeks) and a chemical 2 months ago. Will I be able to see if not hear the heartbeat when I go in on the 2nd?! I know the first time it was 6w3d and I heard the heartbeat but I should have been measuring 8 weeks! I’m so nervous. Just need my nerves to be calmed 😅