What is it?

Courtney • Happily Married 💕 Pregnant with baby #1 due September 2019 ❤️

I’m sorry to have to ask but I really don’t know and goggle keeps giving me different answers. Can someone explain to me what a chemical pregnancy is? I’ve never even heard of it before until I started using this app and I just found out I am pregnant this week and I feel like I should be educated on what that is. Thanks so much ladies.