Hey mummysayang, don't worry too much! I was 5 weeks 4 days when I went for my transvaginal scan cos I was bleeding. Doctor also said no yolk sac found, he didn't mention anything about mc or ectopic, only say to take the medication he gave me (progesterones) to stabilize the pregnancy cos I was bleeding, and wait for a few weeks to go back for review and scan again.
To be honest, I'm also anxious and think of all the negatives. What if no yolk sac, what if no heartbeat etc etc etc. But my parents have been most encouraging and hubby most supporting. What God gives you, no one can take away.
I'm 8 weeks today, puking a lot like more than 8 times a day. My "morning sickness" doesn't start in the morning. It just comes like a combo hit right about 7pm onwards. Continuous non stop, no matter what I eat or drink, it'll just come out. And I get dizzy spells which is quite bad.
Anyway, booked an appointment with Dr Benjamin Tham from TMC in two weeks' time! By then I'll be 10 weeks and hopefully heartbeat and all are there already.
Stay positive!!