Well, first, it depends. When you are living in a family and you don't know what to confess, please ask your husband or your children if they speak English. They will tell you something you can improve. We are not saints. So, I think that when you don't know what to confess, you should ask the Lord in prayer, ask the Holy Spirit, and ask your guardian angel to remind you, to recall some imperfections. We always have many imperfections throughout the day. You can also repent of your past sins. It is also possible to confess to increase, not your scrupulosity, but sometimes to increase your repentance and your humility.