A few days later - A few days later is when you say it’s only been three days,

A few days later is when you say it’s only been three days, but you’re still mad about the one day that was terrible.

You said, 'A few days later, I’m going to beat you up!' even though it had only been two days and you were still sore from the last fight.

Your dog barked at the mailman 'a few days later' even though it had been four days and the mailman had a beard now.

Your friend said, 'A few days later, I’ll be rich!' and now it’s been a week and he’s still selling candy on the street.