We keep trying to fix yesterday's mistakes, atone for sins already fully forgiven, and live consumed with regret. I've a thousand regrets. I could have been a better Dad and husband 15 years ago. You, too, probably have more than a few regrets. Let me tell you, friend.
Tomorrow is the future.
That's why is called the present. God says that when we put our past under His care, confessing the sins and failures, making restitution where possible, we can leave it under His lock and key. It won't be brought up again by Him. So, friend, I urge you to take steps to close the door on the past by giving it to the Keeper of eternity. Let Him sort the sins from the successes.