I am really sorry for you. You claim to be a Christian and yet have no assurance of Salvation.
You see I am secure in my Salvation, Jesus is not a liar.
Of course I will sin, probably every single day.
The difference after Salvation is my sin is painful so immediately I ask forgiveness of the Lord God Almighty.
I am a flawed human that is Saved, if I were perfect I wold not have needed the Cross.
Oh?
I missed it!