There are actually only ever two pastoral problems you will ever encounter. The first is this: persuading those who are under the dominion of sin that they are under the dominion of sin. That's the task of evangelism. And [second], persuading those who are no longer under the dominion of sin that they are no longer under the dominion of sin because they're Christ's.
Yesterday ended last night. Every day is a new beginning. Learn the skill of forgetting. And move on.