Good news: the baby's ultrasound was normal. Two perinatologists looked extensively and they were suprised to find NOTHING wrong! I am so thankful! They wanted me to get an amniocentesis to rule out a couple of other issues the baby could have. But after 5 miscarriages, I decided not to take any chances. Especially because there's nothing that I would terminate the pregnancy for and anything that they'd find on the amnio could be found once the baby is born.
There could still be a placental issue, which they can't really see on ultrasound. So I have to get ultrasounds every 4 weeks to make sure the baby is growing and that the placenta isn't trying to poop out. But I feel like a huge weight has been lifted. I know we're not totally out of the woods, but my biggest worries were laid to rest.