6 week slow HR and lack of nausea

I had my first ultrasound at 6 weeks 1 day. They found a heartbeat but never told me what it was, they didn’t chart it in my record either. I’m going nuts clinging on to her words “slow heart beat” and “must have just started beating”. She scheduled me for a growth scan in two weeks and when I asked why she said “to just check the growth”..The last two days my nausea has completely subsided. With my first, i was deathly sick every day, it was routine. This makes me nervous as i was told my baby had a slow heart beat and my nausea is gone. Anyone have a similar situation? I’m also irritated she never gave me my baby’s heart rate (and mad at myself for not asking., i had my 10 month old with me)