Who else is super nervous about the first scan!?

Emma • 19 mo twin boys 💙💙 7mo baby boy🤰🏼 baby #4 is a GIRL 🎀 on the way!
Who else can't stop thinking about their first scan! I'm between 5-6 weeks (need to confirm at dating scan)
 I've had my bloods done to confirm pregnancy and HCG levels are great! But I still have ten days until my scan! Doctor said by then there would definitely be a heartbeat! Now I can't stop worrying and thinking about it! 
I had an early miscarriage back in February so of course now I'm terrified of it happening again! 
How can I relax!? And would I know if there wasn't going to be a heartbeat (would I have symptoms like bleeding etc.) ?