Early Ultrasound Questions

Has anyone had an early ultrasound done? How far along were you? Did you hear a heartbeat? What was your experience?

I am currently 4w2d. My fertility doctor put in a referral for me to get a scan done at 7 weeks. The ultrasound office called and said they can’t get me in until 8 weeks.

I am slightly panicking. Last year I went for a scan at 7 weeks and there was no heart beat. The following week they confirmed mc. I am terrified to have to wait until the 8 week mark. I am thinking about going to private ultrasound clinic and just pay to get an early scan done at 6.5 weeks just for peace of mind.