history: A few weeks ago a coworker called in sick. I had to work twice as long as I normally would.  A few weeks ago a coworker called in sick. I had to work twice as long as I normally would.  So you covered him. It was very noble from your side to act in this way
current: It was, but it didn't help my feelings towards that coworker. 
next: Well, at least you did something good for that co-worker and most probably he feels indebted toward you