Our salvation does not depend on our personal attempts at righteousness, but on the mercy and kindness of God which He shows us and gives us and rescues us in and through Jesus Christ, our Lord, who suffered, died, and rose again.
The question isn't how many sins can we remember in order to properly account them when we repent, because that's literally impossible. Even if we tried to write a list of all our daily sins down we would still fail to account for all the sins we aren't even aware of. So thankfully our salvation rests not upon us, but upon the Christ who gave His life for us that we might have peace and life with God.
The question is do we trust upon He who suffered and died for us, and if so, let us therefore fall on our knees and humbly repent because we are truly and indeed sinners; and because we are sinners we have this sure and certain word, "That God demonstrates His love toward us in that while we were still sinners Christ died for us" and again, "If we confess our sins, then He is faithful and just to forgive us our sins and cleanse us from all unrighteousness."
Therefore let us boldly confess our sins, admitting our guilt, and now trusting in the Lord with even more boldness confess Him as Lord and Savior in whom and by whom we have every good gift from God. Even our everlasting salvation. To Him alone be all the glory now and always.
-CryptoLutheran