The one that I'm talking about is [Goodnight, I love you by MerlinLikeTheBird](https://archiveofourown.org/works/47877691) where basically there's an Ilness going around in the lower town and they sent Merlin because it attacked elderly people and little kids so Gaius couldn't go. Merlin is tired and hasn't had the time to rest between this and being Arthur’s Manservant, and the idiot misses Merlin’s usual self.
There's also this fic [Finding Home by riventhorn](https://archiveofourown.org/works/167156). A new physician comes after Gaius retires and kicks Merlin out. He decided to go to the stables in WINTER and slept on the floor. When Arthur finds out he insists he sleeps in his room for a while. It has a little spice