Angela, please know that this is an attack of your faith. This attack comes from satan. He does not want you to have reassurance. He is a lier from the pit of hell. You know what God's word has said to you. Do not allow satan to make you second guess what you know is true. Amen!
Satan has many tricks up his sleeve, this is just one of them. Do not give him any victory.
Put on your gospel music, and give God the praise for your salvation and your victory. Praise Him, Praise Him, Praise Him!
God is an awesome God, He has brought you from a mighty long way.
Bless His Holy Name!
Victory is mine, Victory is mine, Victory today is mine. I told satan, get thee behind, because victory today is mine!

Father God, give my sister back her joy. Don't allow that evil demon to make my sister second guess her purpose. You have placed a mission deep within her. Allow her to hear from Your Holy Spirit. Give her the joy like she has never felt if before. I ask this in Jesus Holy Name. Amen (It is so!)