I don't get the use of nog here. The meaning is "it's too late to go back now", but that nog beside the nu makes it a little confusing, like "it's too late to go back still now"? I would expect a word that expressed something like "already", like "it's too late to go back now already", but nog doesn't indicate that idea as far as I know.
Can someone clarify what that nog is actually doing there?
Can someone clarify what that nog is actually doing there?