Psalm 19:12 Who can understand his errors? Cleanse me from secret faults.
None of us is perfect. We all make mistakes and many of those mistakes are sinful in their nature.
Making mistakes is quite normal! But that does not excuse us from the sin we may have committed. So we still have to bring the sin to God.
God is not forgetful, but He is willing to forgive us. We should not try to sweep our sins under the carpet but bring them openly to Him in all honesty for the forgiveness He promises us!
Allow God to forgive you. Don’t hold fast to your sins.