You can't undo anything you've already done, but you can face up to it. You can tell the truth. You can seek forgiveness. And then let God do the rest.
TertullianWe say, and we say openly, and while ye torture us, mangled and gory we cry out, "We worship God through Christ!" Believe Him a man: it is through Him and in Him that God willeth Himself to be known and worshipped.
Tertullian