How do you know everything is okay..?

Samantha

This question may sound silly but my last pregnancy was a silent miscarriage, I had no idea that I lost the baby. We only found out at our 8 week appointment when there was no heartbeat. Thankfully this pregnancy we heard a heartbeat and I am 10 weeks along, but how do I know that everything is okay between appointments…? Will they know the baby is okay and alive with the genetic blood tests? Or do I have to wait for my 13 week ultrasound..??