How do I stop worrying?

Was trying just over a year to get pregnant and had a miscarriage at 10 weeks (baby only measured 5). 14 months later of trying again Im 9 weeks pregnant with our rainbow, I had an early scan at 7 weeks and everything was fine, we even saw the little heartbeat. Now I’ve paid for another scan for the 10th jan because I’m worrying again. I’ll be 10 weeks and I’m scared the baby might have stopped again. Symptoms come and go too and last time I stopped feeling pregnant and the symptoms went. Midwife said it’s unlikely I’ll miscarry again but I can’t stop thinking about it and really just want to enjoy being pregnant.