Agree totally. I lost a baby at 16 weeks, and although I was still worried about the anomoly scan, I pretty much thought I was past the danger period for losing the baby. And mine was a missed miscarriage, so I'd been traipsing along as though nothing was wrong for weeks before I started spotting.
As a consequence, I found it really difficult to relax or even allow myself to believe that the pregnancy would go ahead until I could feel the baby moving on a regular basis. I cried with relief every time I had a scan or heard the baby's heartbeat, but within days, I'd be questioning whether everything was ok.
I still wish I could turn back the clock and enjoy that first half of my pregnancy, but honestly, I'm not sure what I could have thought or done to change things.
Still, I do think focusing on the things within your control and trying to breathe deeply through the rest of the worries will help slightly at keeping things in perspective.
And remember, we're designed (from a survival of the species perspective) to be over protective of this baby we've never met. All good in most circumstances, but when you've lost a baby it really starts to work against you.
So be very kind to yourself while you're experiencing this level of worry, breathe deeply, and do your best to move on with your day.
It's hard - I just don't know what better advice to give you.