Chances of miscarriage?

Sarah • Canadian 🇨🇦 married 4 years, Benjamin Mark born 04/04/2019 Lost Charlotte at 24 weeks to stillbirth on 02/06/21 👼 Currently expecting 🌈 baby May 2022

Hi everyone, I’m currently almost 5 weeks pregnant. My husband and I are excited but trying to be not too excited yet because his previous girlfriend 7 years ago had a miscarriage in her first trimester.

Does anyone know the chances of miscarrying your first pregnancy week by week?