I'm sure everything will be just fine Katie, like you said baby has a good strong heartbeat. When we had our scan at 7 wks they told us then they couldn't give an accurate date hence the 12 wk dating scan. I had a scan at 5 wks and all we saw was gestational sac & yolk sac it was too early for a heartbeat but then we had another scan at 7 weeks and saw it. I'd say your more than 5 if they saw hb! What was measurement if baby? At 7 wks mine was 11.74mm. Try and relax and enjoy! X