How many weeks are you supposed to be? I had a scan at 5w 5d and my hcg was around the 700 mark, and i didn't see a heartbeat then, just a sac. It was until i was just over 7 weeks when we saw the heartbeat, and that was because i had experienced some bleeding. They say usually in your sixth week a heartbeat can be seen. Get your hcg checked again, it should be doubling every couple of days. All the best!
Thanks. Going again today to get levels rechecked. Hoping they go up!