Terrified of a miscarriage

This is my first pregnancy and I'm 4 weeks. I'm absolutely terrified of having a miscarriage. Whenever I feel "wet" down there I freak out. Every time I go to the bathroom I pray there's no blood. I've seen so many women post about miscarriage that I'm so scared. Someone please give me some advice or help make me feel better. I really need that right now.