Terrified

Sooo.. I’m pregnant with my first. I’ll be almost 20 when Bebe is born, he/she was COMPLETELY planned but I’m terrified that I’m going to have a miscarriage. It’s so irrational because when I got my hormones checked before conception everything came back normal, I have pretty normal cycles, I’m still young, I don’t smoke/ drink and I’ve never been pregnant before. Any advice on how to ease my mind? I’m 4w2d