IVF- when did you see/hear HB?

Se

Had my first ultrasound today at 5w6d and we saw the gestational sac and yolk sac but no heartbeat. The nurse said that it might be too early, but reading online it seems like a lot of people see a heartbeat at 6 weeks (which I’ll be tomorrow) especially with internal ultrasound.

Anyone in a similar situation go on to have a healthy pregnancy?