Stressed ugh

I found out I was pregnant when I was 4 weeks and I went in to my obgyn to confirm it and they said they’d run tests on my and get me an ultrasound at 6 weeks (I had a missed miscarriage in December and I just have a huge fear of miscarrying again) well, 6 weeks come around and they call me and tell me there pushing it till 8 weeks because “you won’t be able to see anything so it’d be pointless” which is completely bullshit since I went into an ultrasound with my last pregnancy at 6 weeks. It’s only 2 weeks away but I just really want to know everything’s okay 🙃