It took Cole a whole week for his new arm to stop hurting every time he moved. And then it took him another week for him to have full motor functions. It was alien to him honestly, but he knew that with time he would get used to having parts of him be metal.
He also had to spend a significant amount of that time trying to make it up to Tehila for snapping at her. It wasn't her fault that she got hurt, and it was even more unfair for Cole to put his frustrations on her. He was tired that much everyone could understand, since this event started Cole has not slowed down, not even for once, he was no machine. It has just been one thing after the other until now, so with the arm weighing him down, Cole had no choice but to be with everyone around him.