how to not be anxious between appointments

I become really anxious reading all the posts on social media or community boards about missed miscarriages. And so sorry for all the women going through them. This is my third baby, and I feel like I have more anxiety about this baby than I had with any before. I should be about 11 weeks, but I’m SO worried that I’m going to my next ultrasound and find out it stopped growing or has no heartbeat. I could get another appointment or try using a home Doppler (but it’s probably too early to detect anything). Any tips for not freaking out?

Mother Mable’s reply: