Daily repentance for our sins is something we can do at any time. If we pray, and if we are sincerely sorry for our sins, and we do NOT repeat them, then God forgives us.
That's the easy part. The HARD part is forgiving yourself. That's what you are dealing with now.
Jesus Christ suffered for ALL of our sins in the garden of Gethsemane. He bled tears of blood as he prayed for forgiveness for ALL of us, and he agreed to be sacrificed like a Lamb, and to die, and to rise again in glory, in order to pay the price to our Father, God. Because of HIM, God will listen to us if we pray in His Son's holy name.
God has listened to your prayers, and your terrible sorrow. He has already forgiven you.
NOW learn to forgive yourself. Ask God for help with that. HE will help you, because He loves you more than you love yourself.
