I had 2 miscarriage, the first at 22 and the second at 16 weeks. The first one took me by surprise, but for the second one, it was weeks in the making. I was having cramps, bleedings, I just knew something was going on. The OB/GYN prescribe progesterone pills but it didn't make a difference.
I had 3 children, and for every single pregnancy that ended with a live birth, I was freaking out for 9 months. Checking my underwear every time I went for a wee, sleepless nights every time I felt something weirds and so on.
I don't think you can push the miscarriage fear to the back of your head, but acknowledge it, and live with it.
Be the healthiest you can. I stopped drinking coffee, I was a walking nutrition book, with only fresh food in my diet, putting on minimal weight, no sport for the first 4 month apart from swimming.
It doesn't have to happen again and hopefully it won't. 